Checking the first one of these reveals that indeed
https://www.wikidata.org/w/index.php?title=Q47318649&oldid=619980226#P356
has a statement with a DOI of "234",
which can be traced back to both

• http://europepmc.org/abstract/MED/28302227
  and
• https://www.ncbi.nlm.nih.gov/pubmed/?term=28302227

For this case, a Crossref search does not yield any immediate results, so not sure where the problem may come from.

Trying another one:
https://www.wikidata.org/w/index.php?title=Q47237543&oldid=619205622#P356
has a DOI of "2717", which is stated at both

• http://europepmc.org/abstract/MED/29056119
  and
• https://www.ncbi.nlm.nih.gov/pubmed/?term=29056119

In this case, a Crossref search yields a DOI of 10.1016/j.joca.2012.02.324, which points to a chain of redirects currently ending at http://www.oarsijournal.com/article/S1063-4584(12)00396-2/fulltext .

I am focusing right now on removing those erroneous statements from Wikidata. Have done the first batch with the 200 listed above (sample edit).

The next batch is running (sample edit):

Q47318649 	234
Q47622493 	275
Q39475431 	2404
Q47825282 	248
Q40293032 	2512
Q36307852 	2516
Q38793196 	2590
Q38733604 	2617
Q47296869 	2678
Q50114728 	2690
Q47622499 	271
Q47237518 	2720
Q50064952 	2724
Q50065000 	2736
Q50045792 	2740
Q47581296 	2754
Q47616130 	2755
Q47226404 	2774
Q49557679 	2782
Q47713326 	287
Q48580830 	2370
Q40570392 	2422
Q38733618 	2613
Q47990127 	2671
Q49557873 	2762
Q50120903 	15237
Q38878556 	2292
Q39736348 	2327
Q40632882 	2357
Q38922655 	2382
Q47673009 	2416
Q47677084 	2428
Q39153127 	2641
Q38619588 	2655
Q47736218 	2656
Q50064976 	2732
Q50045794 	2739
Q48544958 	2743
Q47353601 	2751
Q41987594 	2699
Q50045763 	2753
Q47696762 	2763
Q39836601 	2297
Q40109040 	2310
Q47425515 	2316
Q36098487 	2386
Q47400163 	2410
Q38793199 	2589
Q47722197 	2624
Q38660792 	2632
Q47665127 	2658
Q50114800 	2676
Q50114758 	2686
Q47247223 	2694
Q50090649 	2698
Q47237530 	2718
Q42516106 	276
Q47204498 	2776
Q40706287 	2301
Q40736000 	2314
Q40632908 	2346
Q47719531 	2388
Q39475424 	2407
Q39349052 	2424
Q48032288 	2626
Q47270845 	2670
Q47990068 	2679
Q47571730 	2778
Q40615939 	2402
Q33438056 	2502
Q47418501 	2511
Q40143067 	2640
Q46307524 	2685
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Q50236451 	2360
Q40629669 	2379
Q39475418 	2408
Q38793185 	2593
Q47867277 	2615
Q42510833 	2619
Q50090645 	2697
Q47601076 	2705
Q50045773 	2750
Q50045768 	2752
Q42623735 	14430
Q39836614 	2287
Q38844279 	2317
Q47829134 	2515
Q47247232 	2693
Q47243214 	2713
Q47620259 	2728
Q50045751 	2757
Q49557701 	2780
Q41926154 	279
Q40099248 	2364
Q40615954 	2398
Q47326982 	2636
Q47294095 	2652
Q47825307 	2695
Q50064957 	2725
Q43827428 	005
Q47204504 	2771
Q39736373 	2320
Q47757765 	2347
Q39349045 	2425
Q47867247 	2622
Q50114784 	2680
Q41987591 	2704
Q50064971 	2731
Q50045775 	2749
Q47712460 	2352
Q40582887 	2371
Q40615962 	2395
Q40615928 	2414
Q47705190 	2639
Q50090678 	2711
Q47788094 	2312
Q39736353 	2325
Q39475452 	2399
Q47246545 	2506
Q50090655 	2701
Q47219034 	2741
Q47788040 	2326
Q38838463 	2575
Q49557775 	2772
Q39647503 	2362
Q39044311 	2492
Q44339130 	2530
Q47400452 	2389
Q38946283 	2433
Q38793192 	2591
Q38793176 	2596
Q47696342 	2683
Q50090662 	2706
Q47237486 	2722
Q47808580 	2332
Q39240341 	2569
Q47640967 	2677
Q50114734 	2689
Q50064965 	2730
Q47994072 	2436
Q40582868 	2376
Q39480271 	006
Q50146653 	20651
Q47237497 	2721
Q39691739 	72579
Q47270833 	2674
Q47439210 	2285
Q45911568 	29683
Q39508789 	2368
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Q40005702 	45968
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Q38068059 	DOI: 10.4415/ANN_12_04_06
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Q38223516 	DOI: 10.4415/ANN_14_02_07
Q38293866 	12.2014/JCPSP.935939
Q38257829 	DOI: 10.4415/ANN_14_03_09
Q38293149 	DOI: 10.4415/ANN_14_04_03
Q38243386 	JSC.2014.9.2.93
Q38243339 	JSC.2014.9.3.127
Q38306410 	0151801/AIM.0012

Some of those — e.g. those with DOIs of the form "DOI: 10.4415/ANN_11_04_06" (cf. Q37970965) — look like a simple fix, which I will look into later.

I am beginning to think, though, that the best way forward may actually be to keep the wrong DOI statements in Wikidata and to deprecate them there. Given that two reputable sources agree on the values, however, claiming such deprecation would require a reference that attests to the erroneousness of these DOI values, which does not yet exist outside this ticket and the DOI Handbook.

The next batch of 400 (the Wikidata query times out for 500 now, and offsets to get beyond 400 don't work for me either right now):

Q38341640 	015182/AIM.0017
Q38405721 	015184/AIM.009
Q38456105 	CLICA121218711878
Q38459734 	JSC.2015.9.4.269
Q38553664 	07.2015/JCPSP.519524
Q38587640 	09.2015/JCPSP.680688
Q38594233 	IJIV12I1A1
Q38675783 	:10.1922/CDH_4073SONODA04
Q38660509 	0172007/AIM.005
Q38660505 	0172007/AIM.006
Q38672621 	SMW.2017.14445
Q38710855 	0172006/AIM.0010
Q38716190 	SMW.2017.14437
Q38684771 	SMW.2017.14463
Q38729951 	0172004/AIM.003
Q38742443 	SMW.2017.14418
Q38742448 	SMW.2017.14419
Q38797328 	0161904/AIM.0012
Q38770959 	0161905/AIM.007
Q38834414 	0161905/AIM.0011
Q38834417 	0161905/AIM.0012
Q38847771 	IJIV13I2A5
Q38877014 	0151805/AIM.006
Q38891421 	SMW.2017.14409
Q38891407 	SMW.2017.14416
Q38891412 	SMW.2017.14420
Q38950290 	0151811/AIM.0013
Q39133244 	IJIV10I2A4
Q39169338 	DOI: 10.4415/ANN_14_02_03
Q39204713 	0141707/AIM.003
Q39205812 	05.2014/JCPSP.S115S116
Q39218475 	NO_DOI/1491233844057
Q39233111 	0141703/AIM.007
Q39247331 	06.2012/JCPSP.349352
Q39236678 	12.2012/JCPSP.778782
Q39302844 	06.2009/JCPSP.350353
Q39294783 	DOI: 10.4415/ANN_12_02_05
Q39294970 	SMW.2017.14428
Q39320265 	011.02/IJAAI.121132
Q39349354 	JSC.2010.5.3.117
Q39387497 	0161909/AIM.0011
Q39394134 	IJIV10I2A1
Q39427773 	SMW.2017.14447
Q39470650 	0161908/AIM.007
Q39836309 	08112/AIM.0016
Q39845417 	03.2008/JCPSP.147150
Q39881526 	08.04/IJAAI.205210
Q39843718 	08113/AIM.0015
Q39921249 	03.2016/JCPSP.173176
Q39921241 	03.2016/JCPSP.195198
Q39918152 	SMW-12927
Q39920753 	SMW-12975
Q39962050 	0161903/AIM.003
Q39944626 	04.2010/JCPSP.533537
Q39988927 	07.2011/JCPSP.325329
Q39991490 	SMW-12381
Q40026120 	02.2012/JCPSP.163167
Q39997565 	02.2016/JCPSP.125129
Q40005897 	IJIV5I1A3
Q40004005 	SMW-12489
Q40045208 	07.2012/JCPSP.455457
Q40047171 	2008/35/SMW-12108
Q40053227 	DOI:10.2223/JPED.2193
Q40065178 	DOI:10.2223/JPED.2211
Q40067013 	SMW.2017.14497
Q40086363 	01.2016/JCPSP.3640
Q40086347 	01.2016/JCPSP.7475
Q40095440 	012.01/IJAAI.5762
Q40077774 	0121512/AIM.004
Q40095033 	03.2008/JCPSP.137141
Q40095027 	03.2008/JCPSP.158162
Q40141440 	0131610/AIM.007
Q40141500 	0151809/AIM.0013
Q40129316 	CLICA151218011807
Q40183041 	04.2014/JCPSP.256260
Q40157779 	04.2015/JCPSP.S17S18
Q40184432 	12.2015/JCPSP.863866
Q40184409 	12.2015/JCPSP.911913
Q40221030 	0141709/AIM.0010
Q40199489 	0172005/AIM.0012
Q40199485 	0172005/AIM.0013
Q40230145 	11.2013/JCPSP.815817
Q40226081 	12.2013/JCPSP.902903
Q40229557 	CLICA1705699706
Q40244574 	06.2013/JCPSP.437439
Q40274203 	IJIV14I1A2
Q40278947 	IJIV14I1A4
Q40283400 	SMW.2017.14411
Q40319648 	0011144/AIM.0016
Q40326608 	011143/AIM.0015
Q40309032 	0151809/AIM.004
Q40304600 	015188/AIM.009
Q40329161 	04.2011/JCPSP.219222
Q40345721 	01.2016/JCPSP.2326
Q40368637 	0172001/AIM.008
Q40353463 	06.2010/JCPSP.386390
Q40380809 	09.2009/JCPSP.566569
Q40404018 	12.2008/JCPSP.740743
Q40459510 	0151810/AIM.009
Q40493634 	IJIV12I3A3
Q40535657 	09.2015/JCPSP.675679
Q40636043 	CLICA160710391045
Q40634304 	IJIV13I2A6
Q40705423 	0161906/AIM.003
Q40699369 	07.2015/JCPSP.478481
Q40699352 	07.2015/JCPSP.498500
Q40788947 	IJIV12I2A1
Q40862977 	0.1038/35019592
Q40853098 	015186/AIM.005
Q40854304 	03.2016/JCPSP.230231
Q40862298 	12.2015/JCPSP.909910
Q40889305 	0151812/AIM.008
Q40936340 	CLICA151116531658
Q41033309 	04.2015/JCPSP.259263
Q41117726 	11.2015/JCPSP.815818
Q41113314 	DOI:10.11817/J.ISSN.1672-7347.2015.06.018
Q41135696 	IJIV12I2A3
Q41183271 	CLICA151116811688
Q41218474 	03.2015/JCPSP.202205
Q41300492 	04.2015/JCPSP.247249
Q41454366 	08.2015/JCPSP.602605
Q41554987 	01.2015/JCPSP.2730
Q41597502 	0151807/AIM.006
Q41592443 	DOI: 10.4415/ANN_14_04_09
Q41648780 	CLICA141217711778
Q41670411 	12.2014/JCPSP.902907
Q41670404 	12.2014/JCPSP.908913
Q41705293 	0141710/AIM.0015
Q41734271 	09.2014/JCPSP.624627
Q41734250 	09.2014/JCPSP.695697
Q41712315 	DOI: 10.4415/ANN_14_03_12
Q41916657 	0151810/AIM.0013
Q41955233 	0.1017/DMP.2015.51
Q41964708 	0141701/AIM.0010
Q41940956 	04.2008/JCPSP.257258
Q41938760 	08.2008/JCPSP.520521
Q41935815 	IJIV14I3A1
Q42144693 	04.2015/JCPSP.S33S35
Q42166476 	/S0034-98872010000200006
Q42164093 	08113/AIM.0010
Q42164126 	08113/AIM.0017
Q42232233 	0141701/AIM.0012
Q42237012 	DOI: 10.4415/ANN_13_04_12
Q42246301 	IJIV10I4A6
Q42231217 	IJIV11I1A1
Q42264833 	0131610/AIM.0015
Q42273853 	013163/AIM.0015
Q42269040 	DOI: 10.4415/ANN_13_01_09
Q42266525 	DOI: 10.4415/ANN_13_03_09
Q42288883 	0121511/AIM.0014
Q42638575 	11.2009/JCPSP.744746
Q42655918 	02.2010/JCPSP.106111
Q42652117 	DOI: 10.4415/ANN_14_01_05
Q42741557 	/S0034-98872010001300002
Q42741546 	/S0034-98872010001300007
Q42741567 	/S0716-97602010000400003
Q42753740 	/S0034-98872010001100011
Q42753738 	/S0034-98872010001100012
Q42753734 	/S0034-98872010001100013
Q42753731 	/S0034-98872010001100015
Q42753821 	/S0034-98872010001200002
Q42753810 	/S0034-98872010001200006
Q42753795 	/S0034-98872010001200011
Q42753784 	/S0034-98872010001200015
Q42753781 	/S0034-98872010001200016
Q42753769 	/S0034-98872010001200020
Q42756486 	/S0034-98872010000900002
Q42756461 	/S0034-98872010000900012
Q42783028 	/S0034-98872010000800006
Q42783023 	/S0034-98872010000800008
Q42783016 	/S0034-98872010000800012
Q42782996 	/S0034-98872010000800020
Q42782992 	/S0034-98872010000800021
Q42778827 	/S0716-97602010000100002
Q42778818 	/S0716-97602010000100013
Q42769475 	011141/AIM.008
Q42762066 	12.2010/JCPSP.802805
Q42762062 	12.2010/JCPSP.822824
Q42788286 	CLICA101218071813
Q42788281 	CLICA101218201827
Q42843964 	/S0716-97602010000200001
Q42840600 	010136/AIM.0020
Q26999319 	013161/AIM.0014
Q28843411 	DOI:10.1006/KNAC.1993.1008
Q30061902 	0161911/AIM.0011
Q30379614 	IJIV12I3A5
Q30382601 	SMW-12952
Q30395614 	TUFFC.2015.007202
Q30852031 	15.13155/NCOMMS11317
Q31063185 	CLICA1604573578
Q33165886 	06.2015/JCPSP.403406
Q33160444 	09.2011/JCPSP.572573
Q33158024 	11.2009/JCPSP.686689
Q33321013 	08112/AIM.004
Q33345778 	DOI:10.1017/S1740925X04000110
Q33406200 	012.01/IJAAI.5056
Q33414481 	04.2014/JCPSP.285287
Q33378858 	IJIV5I1A7
Q33418515 	0141711/AIM.0016
Q33420137 	015182/AIM.0010
Q33419390 	11.2014/JCPSP.S216S218
Q33456963 	013162/AIM.006
Q33478092 	07.2009/JCPSP.440443
Q33492701 	08.02/IJAAI.7784
Q34118412 	JSC.2012.7.3.181
Q34336803 	04.2013/JCPSP.293294
Q34431011 	014178/AIM.0013
Q34458542 	0121511/AIM.0010
Q34479994 	015186/AIM.0016
Q34696158 	DOI 10.2310/7290.2014.00020
Q34775727 	02.2008/JCPSP.7881
Q35790023 	CLICA151015051511
Q35804458 	012151/AIM.007
Q35856377 	0151812/AIM.0010
Q35938904 	0161903/AIM.008
Q36355758 	CLICA1705715721
Q37057971 	2007/49/SMW-11986
Q37041811 	CVJ-21.001
Q37041794 	CVJ-21.007
Q37073300 	CVJ-21.004
Q37077532 	CVJ-21.006
Q37073346 	CVJ-21.015
Q37222381 	2008/27/SMW-12153
Q37438707 	04.2009/JCPSP.223227
Q37520755 	SMW-12476
Q37520751 	SMW-12584
Q37560786 	SMW-12270
Q37634034 	SMW-12667
Q37634037 	SMW-12742
Q37666883 	SMW-12661
Q37641882 	SMW-12741
Q37673071 	SMW-12953
Q37766732 	DOI: 10.4415/ANN_10_02_03
Q37760429 	JSC.2009.4.1.57
Q37734974 	SMW-12977
Q37824845 	011141/AIM.0010
Q37789578 	DOI: 10.4415/ANN_10_03_09
Q37848397 	011142/AIM.0019
Q37855216 	04.2009/JCPSP.228231
Q37853832 	12.2009/JCPSP.772775
Q37857914 	IJIV5I1A5
Q37906207 	DOI: 10.1227/NEU.0B013E31820A19FC
Q37994665 	011.01/IJAAI.113
Q37980188 	012152/AIM.007
Q37970968 	DOI: 10.4415/ANN_11_04_08
Q37982314 	JSC.2010.5.4.177
Q38023829 	011.02/IJAAI.111119
Q38040592 	011.03/IJAAI.203216
Q38055881 	0121511/AIM.0013
Q38029135 	012158/AIM.0010
Q38059327 	11.2012/JCPSP.711715
Q38058175 	DOI: 10.3113/FAI.2012.0969
Q38058176 	DOI: 10.3113/FAI.2012.1031
Q38071363 	01.2013/JCPSP.7782
Q38071364 	01.2013/JCPSP.8385
Q38063388 	TA.0B013E3182754654
Q38085985 	012.01/IJAAI.117
Q38077599 	013162/AIM.0013
Q38083749 	013163/AIM.0012
Q38111584 	DOI: 10.4244/EIJV9SRA10
Q38114798 	DOI: 10.4415/ANN_13_02_14
Q38137318 	09.2013/JCPSP.653656
Q38166398 	DOI: 10.11607/JOMI.TE29
Q38160333 	JSC.2013.7.4.245
Q38177438 	01.2014/JCPSP.6061
Q38195352 	0141703/AIM.0013
Q38195348 	0141703/AIM.004
Q38201612 	DOI: 10.4415/ANN_14_01_12
Q38201957 	JSC.2014.8.3/4.189
Q38232878 	07.2014/JCPSP.508514
Q38243387 	JSC.2014.9.2.107
Q38325580 	01.2015/JCPSP.4145
Q38390194 	0141709/AIM.0011
Q38405735 	015184/AIM.0012
Q38378874 	03.2015/JCPSP.210215
Q38410646 	0161901/AIM.0010
Q38477899 	014174/AIM.009
Q38522485 	015186/AIM.0011
Q38678879 	0161901/AIM.0012
Q38675664 	12.2015/JCPSP.891896
Q38657235 	SMW.2017.14470
Q38703419 	01.2016/JCPSP.5159
Q38684775 	SMW.2017.14474
Q38722765 	NO_DOI/1497537194790
Q38764868 	0161906/AIM.009
Q38782854 	0172005/AIM.0010
Q38782867 	0172005/AIM.003
Q38794891 	SMW.2017.14429
Q38901613 	011.03/IJAAI.253258
Q38891013 	015184/AIM.006
Q38911422 	0172003/AIM.0012
Q38911432 	0172003/AIM.005
Q38911428 	0172003/AIM.008
Q38878936 	JSC.2015.9.4.243
Q38887828 	NO_DOI/1490108138367
Q38924453 	JSC.2015.10.4.217
Q38997521 	015186/AIM.006
Q38971948 	DOI 10.2310/7290.2014.00021
Q38976978 	SMW.2017.14401
Q39080326 	IJIV13I4A7
Q39194806 	01.2016/JCPSP.6062
Q39201616 	03.2013/JCPSP.234236
Q39213874 	01.2014/JCPSP.4346
Q39212358 	02.2016/JCPSP.156157
Q39222397 	08.2013/JCPSP.533537
Q39245733 	11.2012/JCPSP.690693
Q39215294 	MAGYONKOL.2013.57.4.275
Q39320259 	011.02/IJAAI.165173
Q39311076 	07.04/IJAAI.221229
Q39291760 	08.03/IJAAI.165168
Q39311986 	2008/43/SMW-12288
Q39348707 	IJIV13I3A6
Q39427785 	SMW.2017.14440
Q39452256 	015188/AIM.0017
Q39455973 	IJIV10I1A7
Q39618427 	0151805/AIM.0014
Q39687758 	11.2011/JCPSP.662665
Q39766504 	0161905/AIM.004
Q39803971 	DOI: 10.4415/ANN_10_04_01
Q39845141 	02.2008/JCPSP.9597
Q39836318 	08112/AIM.0018
Q39879550 	IJIV13I1A1
Q39871689 	IJIV6I1A3
Q39897126 	SMW-12607
Q39938102 	2008/37/SMW-12385
Q39939923 	IJIV5I3A3
Q39903205 	IJIV5I4A3
Q39948512 	010135/AIM.005
Q39962033 	0161903/AIM.007
Q39997582 	02.2016/JCPSP.9195
Q39983128 	05.2009/JCPSP.287290
Q39963481 	DOI: 10.4415/ANN_10_04_03
Q39967340 	IJIV6I2A3
Q40018752 	012152/AIM.0010
Q40031386 	012155/AIM.007
Q40030394 	0161902/AIM.0011
Q40058082 	SMW.2017.14472
Q40084326 	SMW.2017.14482
Q40114066 	03.2016/JCPSP.223224
Q40147102 	0172006/AIM.004
Q40147078 	0172006/AIM.009
Q40157770 	04.2015/JCPSP.S20S21
Q40157763 	04.2015/JCPSP.S30S32
Q40157540 	DOI: 10.4415/ANN_13_04_04
Q40153603 	IJIV14I2A6
Q40199395 	07.2014/JCPSP.472476
Q40184435 	12.2015/JCPSP.860862
Q40232432 	0141711/AIM.006
Q40219029 	02.2014/JCPSP.114117
Q40210953 	03.2014/JCPSP.S20S21
Q40274489 	04.2015/JCPSP.276280
Q40247831 	05.2013/JCPSP.359361
Q40265315 	12.2012/JCPSP.803805
Q40244757 	12.2014/JCPSP.940943
Q40320284 	07.2011/JCPSP.369370
Q40301420 	DOI:10.5152/TPD.2011.59
Q40312037 	MAGYONKOL.2011.55.3.155
Q40334773 	0172002/AIM.006
Q40349644 	09.2010/JCPSP.581585
Q40362009 	0172001/AIM.0013
Q40388125 	06.2009/JCPSP.393394
Q40420132 	01.2008/JCPSP.3739
Q40415641 	0161912/AIM.006
Q40419797 	03.2008/JCPSP.163167
Q40419164 	2008/17/SMW-12051
Q40407740 	CLICA1701117123
Q40459519 	0151810/AIM.004
Q40493629 	IJIV12I3A6
Q40568880 	0161908/AIM.0014
Q40613986 	0161908/AIM.0010
Q40609559 	08.2015/JCPSP.625626
Q40674744 	0161905/AIM.0010
Q40674739 	0161905/AIM.0013
Q40699362 	07.2015/JCPSP.486490
Q40680985 	CLICA1607973979
Q40751373 	0151807/AIM.007
Q40904393 	05.2015/JCPSP.386388
Q40919757 	0037-8682-0004-2015
Q40997671 	09.2015/JCPSP.671674
Q41215948 	0151803/AIM.005
Q41218490 	03.2015/JCPSP.176180
Q41218458 	03.2015/JCPSP.223224
Q41431510 	010136/AIM.0022
Q41470813 	02.2015/JCPSP.100103
Q41454375 	08.2015/JCPSP.588591
Q41463562 	CLICA1503359365
Q41565075 	0151801/AIM.0015
Q41591390 	12.2014/JCPSP.914917
Q41629123 	0151801/AIM.0010
Q41657817 	11.2014/JCPSP.840844
Q41718907 	05.2015/JCPSP.354358
Q41918472 	02.2015/JCPSP.129133
Q41929900 	0141707/AIM.0014
Q41930630 	0172005/AIM.0014
Q42003021 	2008/19/SMW-12056
Q42166443 	/S0034-98872010000200002
Q42166458 	/S0034-98872010000200004
Q42166548 	/S0034-98872010000200016
Q42164111 	08113/AIM.0014
Q42210773 	06.2014/JCPSP.392395

Those 400 are now fixed as well (sample edit).

The next 50 (everything larger times out):

Q42249720 	013169/AIM.007
Q42239424 	02.2014/JCPSP.97100
Q42256978 	IJIV10I2A6
Q42437714 	JSC.2012.7.3.127
Q42475117 	SMW-12718
Q42510065 	012158/AIM.0016
Q42644893 	012155/AIM.0012
Q42722644 	012151/AIM.009
Q42783032 	/S0034-98872010000800004
Q42783030 	/S0034-98872010000800005
Q42783014 	/S0034-98872010000800013
Q42783005 	/S0034-98872010000800016
Q42783002 	/S0034-98872010000800017
Q42753760 	/S0034-98872010001100003
Q42753722 	/S0034-98872010001100018
Q42753805 	/S0034-98872010001200008
Q42753802 	/S0034-98872010001200009
Q42753792 	/S0034-98872010001200012
Q42753776 	/S0034-98872010001200018
Q42753773 	/S0034-98872010001200019
Q42741531 	/S0034-98872010001300014
Q42741526 	/S0034-98872010001300017
Q42756443 	/S0716-97602010000300005
Q42741559 	/S0716-97602010000400011
Q42762067 	12.2010/JCPSP.794797
Q42813472 	04.2010/JCPSP.748752
Q42843955 	/S0716-97602010000200007
Q42841266 	CLICA101117111717
Q26991595 	0141712/AIM.009
Q28870154 	DOI:10.1080/03115518308619633
Q29042780 	DOI:10.7925/DRS1.UCDLIB_45928
Q30248376 	0161908/AIM.0012
Q30235309 	0172003/AIM.0011
Q30371741 	07.2008/JCPSP.445450
Q30414367 	012154/AIM.0014
Q30399859 	02.2011/JCPSP.97102
Q33160770 	12.2011/JCPSP.769771
Q33331609 	02.2008/JCPSP.102104
Q33380977 	06.2008/JCPSP.362368
Q33368033 	07.03/IJAAI.115131
Q33369489 	2008/35/SMW-12273
Q33433002 	0161906/AIM.0010
Q33400236 	02.2012/JCPSP.192193
Q33428354 	04.2009/JCPSP.219222
Q33419394 	11.2014/JCPSP.S253S255
Q33427612 	11.2015/JCPSP.802806
Q33527773 	CLICA1002268272
Q33511273 	SMW-12767
Q33650452 	04.2010/JCPSP.524527
Q33644679 	SMW-12768

Those 50 are fixed too (sample edit).

Would it be better to deprecate rather than delete?

@fnielsen Yes, deprecation seems to be better, but we need to annotate the deprecation properly (see my comment above), so I think it's OK to remove it for now, but we should eventually put it back in as deprecated, ideally along with whatever valid DOIs these articles actually do have.

Meanwhile, I checked the Wikidata query again, and while it timed out in the Wikidata Query Service, it ran through in the Linked Data Fragments endpoint, giving 0 results as of now.

Actually, re-running it with a limit 1 still yields a result (Q33810881), which I'm thus using to play around with how to indicate the deprecation.

This query gives a list of reasons used in "reason for deprecation" (P2241) statements:

SELECT DISTINCT ?reason ?reasonLabel  WHERE {
  ?statement pq:P2241 ?reason.
  SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
}

Of these, error (Q29485) seemed the most plausible, so I used that on Q33810881.

I went randomly through some more entries in the list and have not found any case yet where the PMC/ PubMed entries were correct.

Summary of today's batch edits, as per https://tools.wmflabs.org/quickstatements/#mode=batches :

2180 | Daniel Mietchen | More odd DOIs, as per https://github.com/br2s/bug-reports-to-science/issues/8 | DONE DONE:50 | 2018-03-13 12:01:19 |  
2179 | Daniel Mietchen | More odd DOIs, as per https://github.com/br2s/bug-reports-to-science/issues/8 | DONE DONE:400 | 2018-03-13 11:39:42 |  
2178 | Daniel Mietchen | More odd DOIs, as per https://github.com/br2s/bug-reports-to-science/issues/8 | DONE DONE:500 | 2018-03-13 11:16:10 |  
2177 | Daniel Mietchen | next try | DONE DONE:199 \| RUN:1 | 2018-03-13 10:26:18 |  
2176 | Daniel Mietchen | remove incorrect DOI statements | DONE ERROR:200 | 2018-03-13 10:20:33

Update: LDF just found 16 new cases, all from items that had been started after the above cleanup.

For a related discussion, see https://twitter.com/27point7/status/1070818580789383168 .

Current counts

• via LDF: 135
• via WDQS: at least 300 (a direct count times out)