I am looking for a complete metaanalysis paper on the above topic. Methods – Would like searching Medline, Embase, Pubmed, Psycinfo and Cinahl databases with the following keywords – choking, antipsychotic agents, neuroleptic agents (could be more keywords if needed). Would like to consider both experimental and epidemiological study designs including randomized controlled trials, non-randomized controlled trials, quasi-experimental, before and after studies, prospective and retrospective cohort studies, case control studies and analytical cross sectional studies for inclusion. People of any age, gender, nationality to be considered