“…Eleven studies did not include a theoretical framework (54,56,57,58,60,61,63,65,66,69,70); eight did not report whether or not they obtained ethical approval (54, 57, 60-62, 64, 69, 70); 15 did not report whether or not informed consent was obtained (54-66, 69, 70) and 14 did not report the influence of the researcher and whether participants could give opinions Copyright © 2015 Wolters Kluwer Health, Inc. Unauthorized reproduction of the article is prohibited.…”