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Correspondence
Letter to the editors
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Online download statistics by month: January 2013 to August 2021

AbstractFullPdf
Jan 201305233
Feb 20130153
Mar 201306647
Apr 201301727
May 2013056
Jun 2013231812
Jul 201329144
Aug 20131333
Sep 20132985
Oct 201320112
Nov 2013947
Dec 2013521
Jan 2014892
Feb 20141031
Mar 20141252
Apr 20141011
May 20141121
Jun 2014001
Jul 20141200
Aug 2014100
Sep 2014201
Oct 2014520
Nov 2014322
Dec 2014701
Jan 2015610
Mar 20151801
Apr 2015821
May 2015100
Jun 2015711
Jul 2015700
Aug 2015300
Sep 2015700
Oct 2015400
Nov 2015512
Dec 2015300
Feb 2016400
Mar 2016100
Apr 2016291
May 2016231
Jun 20169101
Jul 2016741
Aug 20161320
Sep 2016621
Oct 201621102
Nov 2016581
Dec 2016931
Jan 20171045
Feb 2017335
Mar 2017351
Apr 2017191
May 2017230
Jun 2017274
Jul 2017221
Aug 2017661
Sep 2017660
Oct 201714145
Nov 20171291
Dec 2017992
Jan 201814101
Feb 201819114
Mar 2018272310
Apr 201814102
May 201814143
Jun 201818204
Jul 2018880
Aug 2018882
Sep 2018998
Oct 2018992
Nov 201811116
Dec 2018881
Jan 2019554
Feb 201911102
Mar 2019667
Apr 2019447
May 2019557
Jun 2019776
Jul 2019557
Aug 2019775
Sep 2019775
Oct 201914148
Nov 20193310
Dec 2019552
Jan 2020885
Feb 2020546
Mar 2020336
Apr 2020663
May 202014148
Jun 202017174
Jul 202017165
Aug 2020882
Sep 202027277
Oct 202024243
Nov 202013133
Dec 202020208
Jan 2021983
Feb 2021111112
Mar 202125257
Apr 202113139
May 202113134
Jun 202123237
Jul 202113137
Aug 202125255
Total959882429