Abstract Background We sought to understand the main ethical considerations when conducting clinical trials in the prehospital ambulance based setting. Methods A systematic review of the literature on randomised controlled trials in ambulance settings was undertaken. A search of eight databases identified published studies involving recruitment of ambulance service users. https://ddqandysyfhi10.timeblog.net/70683102/an-inexact-multiple-recourse-hybrid-fuel-management-model-with-considering-carbon-reduction-requirement-for-a-biofuel-penetrated-heating-system