“…Nine studies were randomized controlled trials (Ashby et al, 2014;Downing et al, 2015;Harron et al, 2016;Lall et al, 2015;Murray et al, 2014;Rosenthal et al, 2015;Smulders et al, 2016;Walter et al, 2015), usually comparing clinical benefi ts and cost-effectiveness of the traditional device with a new developed one, one study was a prospective study (Dozet et al, 2016), using a cost-minimization analysis for societal impact reasons, and one was a survey (Heintz et al, 2016), conducted among 33 European countries, which are involved in the European Network for Health Technology Assessment. The aim of this survey was to provide a general framework for economic evaluation at a European level.…”