“…The first part of the questionnaire (Supplemental data 2) was based on current literature [2,4,5,10,13], and screened for validity and relevance by an expert board of Dutch military medical specialists (Delphi method). It focused on three main topics: (1) participants general background, (2) exposure to combat (casualty) situations, and (3) self-perceived QoC in the pre-hospital phase (QoC was described as the subjective judgment by the participants, and expressed in a numeric variable from 1 [low] to 10 [high]; in this study we defined a score of 7 as average).…”