Winnette R, Zárate V, Machnicki G, DeMuro-Mercon C, Gawlicki M, Gnanasakthy A. Patient-reported outcomes in Latin America: implementation in research and role in emerging HTA systems. Value in Health Regional Issues. 2015 Dec;8:49-55. doi: 10.1016/j.vhri.2015.03.008
Viera AJ, Edwards T. Does an offer for a free on-line continuing medical education (CME) activity increase physician survey response rate? A randomized trial. BMC Res Notes. 2012 Mar 7;5:129. doi: 10.1186/1756-0500-5-129