Ms Friedel conceptualized and designed the study, searched all studies in the databases, screened all studies on the basis of titles and abstracts, screened all fulltext articles, designed the extraction tables, extracted all data from the included studies, drafted the initial manuscript, and reviewed and revised the manuscript; Dr Aujoulat contributed to the conceptualization of the study, screening of all full-text articles, design of the extraction tables, extraction of data from the included