A rational model for assessing and evaluating complex interventions in health careCarl May(London School of Hygiene & Tropical Medicine)BMC Health Services ResearchJuly 7, 200610.1186/1472-6963-6-86Cited by 456SaveCiteExport RISWatch citationsRelated PapersAn open letter to<i>The BMJ</i>editors on qualitative research|BMJ|2016|362