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Papers

Notice of inadvertent duplicate publication

BMJ 1999; 318 doi: https://doi.org/10.1136/bmj.318.7177.157 (Published 16 January 1999) Cite this as: BMJ 1999;318:157

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 November 2021

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AbstractFullPdf
Jul 2003070
Aug 20030240
Sep 20030196
Oct 20030539
Nov 20030747
Dec 20030919
Jan 20040533
Feb 2004036
Mar 20040722
Apr 2004044
May 2004081
Jun 2004070
Jul 2004071
Aug 2004072
Sep 2004041
Oct 2004060
Nov 20040101
Dec 20040280
Jan 20050130
Feb 2005061
Mar 20050120
Apr 2005021
May 2005011
Jun 2005011
Jul 2005111
Aug 2005032
Sep 2005011
Oct 2005020
Nov 2005022
Dec 2005031
Jan 2006011
Feb 2006020
Mar 2006022
Apr 2006010
May 2006020
Jun 2006010
Jul 2006040
Sep 2006014
Oct 2006019
Nov 20060210
Dec 20060313
Jan 20070214
Feb 20070110
Mar 2007017
Apr 20070310
May 20070210
Jun 20070213
Jul 2007012
Aug 2007022
Sep 2007016
Oct 2007018
Nov 2007026
Dec 2007027
Jan 2008048
Feb 20080718
Mar 2008023
Apr 20080212
May 20080114
Jun 2008076
Jul 2008047
Aug 2008024
Sep 2008013
Oct 2008033
Nov 2008042
Dec 20080010
Jan 2009009
Feb 2009016
Mar 2009002
Apr 2009010
Jul 2009020
Aug 2009120
Sep 2009021
Nov 2009010
Dec 2009006
Jan 2010004
Feb 2010102
Mar 2010012
Apr 2010002
May 2010002
Jun 2010011
Jul 2010172
Aug 2010301
Sep 2010115
Oct 2010115
Nov 2010202
Dec 2010012
Jan 2011106
Mar 2011105
Apr 2011103
May 2011003
Jun 2011001
Jul 20112405
Aug 20111406
Sep 20111423
Oct 20112611
Nov 2011431
Jan 2012041
May 2012021
Jul 2012131
Aug 2012002
Sep 2012010
Oct 2012050
Nov 2012030
Dec 2012010
Jan 2013031
Mar 2013010
Apr 2013011
May 2013051
Jun 2013181
Jul 2013070
Aug 2013010
Oct 2013011
Dec 2013121
Mar 2014021
Apr 2014022
May 2014030
Jun 2014070
Jul 2014023
Aug 2014021
Sep 2014010
Nov 2014001
Mar 2015001
Apr 2015038
May 2015026
Jul 2015010
Sep 2015014
Dec 2015032
Mar 2016132
Jun 2016001
Aug 2016010
Sep 2016016
Oct 2016011
Nov 2016010
Dec 2016012
Jan 2017010
Feb 2017031
Mar 2017091
Apr 2017051
May 2017031
Jun 2017030
Jul 2017041
Aug 2017030
Sep 2017040
Oct 2017012
Nov 2017010
Dec 2017022
Jan 2018020
Feb 2018023
Mar 2018052
Apr 2018021
May 2018052
Jun 2018011
Jul 2018023
Aug 2018035
Oct 2018022
Nov 2018022
Dec 2018062
Jan 2019033
Feb 2019058
Mar 2019025
Apr 2019024
May 2019145
Jun 2019024
Jul 2019038
Aug 2019013
Sep 2019001
Oct 2019027
Nov 2019024
Dec 2019022
Jan 2020031
Feb 2020021
Mar 2020023
Apr 2020034
May 20204354
Jun 2020024
Jul 2020034
Aug 2020042
Sep 2020053
Oct 2020014
Nov 2020075
Dec 2020053
Jan 2021032
Feb 2021143
Mar 2021073
Apr 2021073
May 2021035
Jun 2021011
Jul 20210435
Aug 20210312
Sep 20210415
Oct 20211694
Nov 20210278
Total107618932