Intended for healthcare professionals

Editorials

Every system is designed to get the results it gets

BMJ 1997; 315 doi: https://doi.org/10.1136/bmj.315.7113.897 (Published 11 October 1997) Cite this as: BMJ 1997;315:897

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: July 2003 to June 2021

Rendering graph...
AbstractFullPdf
Jul 2003080
Aug 20030120
Sep 20030100
Oct 2003080
Nov 2003060
Dec 2003070
Jan 2004090
Feb 2004090
Mar 2004080
Apr 20040130
May 2004090
Jun 20040110
Jul 2004080
Aug 2004080
Sep 20044120
Oct 2004060
Nov 2004370
Dec 200421290
Jan 20057120
Feb 2005040
Mar 20050190
Apr 2005150
May 2005050
Jun 20051120
Jul 20050120
Aug 2005170
Sep 20051110
Oct 2005190
Nov 2005280
Dec 20050100
Jan 2006090
Feb 2006070
Mar 2006180
Apr 2006140
May 20061100
Jun 2006070
Jul 2006050
Aug 2006010
Sep 2006260
Oct 20067130
Nov 2006140
Dec 2006040
Jan 20071120
Feb 2007150
Mar 2007080
Apr 20070130
May 2007090
Jun 20070120
Jul 2007090
Aug 20070160
Sep 20070100
Oct 20070210
Nov 2007090
Dec 2007090
Jan 20080110
Feb 20080140
Mar 20080190
Apr 20080170
May 20080150
Jun 20080210
Jul 20082180
Aug 20080130
Sep 20080130
Oct 2008090
Nov 20082150
Dec 20080100
Jan 2009730
Feb 2009350
Mar 200915180
Apr 20091040
May 2009980
Jun 20091470
Jul 2009820
Aug 20091020
Sep 2009940
Oct 2009820
Nov 2009540
Dec 2009330
Jan 2010710
Feb 2010630
Mar 20101220
Apr 20101230
May 201013150
Jun 20101620
Jul 2010520
Aug 20101130
Sep 20102440
Oct 20101010
Nov 20101820
Dec 20101340
Jan 20111550
Feb 20111420
Mar 20111910
Apr 20111220
May 20111110
Jun 20111310
Jul 2011410
Aug 2011340
Sep 2011250
Oct 2011440
Nov 2011050
Dec 2011080
Jan 2012520
Feb 20121100
Mar 20121320
Apr 2012310
May 2012640
Jun 2012400
Jul 2012300
Aug 2012130
Sep 2012200
Oct 20121300
Nov 20121110
Dec 20121010
Jan 2013100
Feb 2013200
Mar 2013350
Apr 2013420
May 2013030
Jun 2013850
Jul 2013540
Aug 2013600
Sep 2013420
Oct 2013110
Nov 2013500
Dec 2013430
Jan 2014710
Feb 2014500
Mar 2014700
Apr 20141120
May 2014810
Jun 2014500
Jul 20140110
Aug 2014200
Sep 2014200
Nov 2014120
Dec 2014110
Jan 2015100
Feb 2015940
Mar 2015420
Apr 2015810
May 2015300
Jun 2015500
Jul 2015610
Aug 2015100
Sep 2015420
Oct 2015310
Nov 2015300
Dec 2015750
Jan 2016200
Feb 2016200
Mar 2016100
Jun 2016200
Aug 2016400
Sep 2016300
Oct 2016500
Nov 2016100
Dec 2016210
Jan 20171500
Feb 2017300
Mar 2017510
Apr 2017210
May 2017610
Jun 2017700
Jul 2017620
Aug 2017320
Sep 2017600
Oct 2017700
Nov 2017500
Dec 2017300
Jan 2018610
Feb 20181030
Mar 2018500
Apr 20181030
May 2018940
Jun 2018720
Jul 2018520
Aug 2018310
Sep 2018310
Oct 2018410
Nov 2018120
Dec 2018810
Jan 20191230
Feb 20191220
Mar 20192020
Apr 2019510
May 20191200
Jun 2019510
Jul 2019530
Aug 20191100
Sep 2019700
Oct 2019110
Nov 20191120
Dec 20191700
Jan 2020510
Feb 2020620
Mar 2020100
Apr 2020400
May 20202600
Jun 2020910
Jul 2020900
Aug 20201440
Sep 20202010
Oct 20203430
Nov 20203110
Dec 20201930
Jan 20211020
Feb 2021700
Mar 2021400
Apr 2021800
May 20211120
Jun 2021620
Total11379620