“…We thus analyzed the cohort studies based on 19 items (1,2,3,5,6,7,9,10,11,12,16,17,18,20,21,22,25,26,27) and the case-control studies based on 17 items (1,2,3,5,6,7,10,11,12,16,17,18,20,21,22,25,27). Items 9 and 26 were not used in the evaluation of case-control studies since they contain questions that do not apply to this type of study.…”