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Impact of covert duplicate publication on meta-analysis: a case study

BMJ 1997; 315 doi: https://doi.org/10.1136/bmj.315.7109.635 (Published 13 September 1997) Cite this as: BMJ 1997;315:635

Article usage

Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.

Usage statistics: January 2018 to April 2024

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AbstractFullPdf
Jan 201801050
Feb 20180820
Mar 20183600
Apr 20180690
May 20182940
Jun 20180810
Jul 20185720
Aug 20181500
Sep 20183820
Oct 201851400
Nov 201861130
Dec 201831260
Jan 201921170
Feb 201911040
Mar 20193870
Apr 20192790
May 20198660
Jun 20191920
Jul 20191960
Aug 201943370
Oct 201901270
Nov 201941320
Dec 20191490
Jan 20202820
Feb 202041380
Mar 202011070
May 202002690
Jun 202011410
Jul 202091720
Aug 202011660
Sep 202001680
Oct 202011340
Nov 202031240
Dec 20202940
Jan 20210640
Feb 20214810
Mar 20212600
Apr 202161240
May 20218650
Jun 202131490
Jul 2021141260
Aug 20215880
Sep 202141090
Oct 20211730
Nov 20214870
Dec 20211610
Jan 20226530
Feb 20224620
Mar 20226820
Apr 202291060
May 20222920
Jun 20220910
Jul 20221640
Aug 20222720
Sep 20224650
Oct 2022101690
Nov 202251180
Dec 202211100
Jan 202321050
Feb 20232900
Mar 20232590
Apr 20231590
May 20233490
Jun 20234640
Jul 20230670
Aug 20234990
Sep 202371230
Oct 2023131320
Nov 2023181640
Dec 202392350
Jan 202432940
Feb 2024101750
Mar 202451160
Apr 202481680
Total27281250
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