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Payment in challenge studies from an economics perspective

 

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AbstractFullPdf
Oct 202013913916
Nov 202047947689
Dec 202026425540
Jan 202117315922
Feb 2021747112
Mar 2021655721
Apr 2021494519
May 2021453711
Jun 2021464115
Jul 2021434013
Aug 2021332812
Sep 2021493814
Oct 2021504028
Total15091426312

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