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Face mask sign

 

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Online download statistics by month: September 2021 to August 2022

AbstractFullPdf
Sep 20211808842
Oct 202199012838
Nov 2021122110861
Dec 20215479535
Jan 20224197836
Feb 20223821914
Mar 20222482413
Apr 202220099
May 2022127147
Jun 202210060
Jul 202210783
Aug 202213965
Total4660583263

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