Search results
The selection process was presented in Figure S1 . The initial search identified 1742 articles. After duplicate articles removed, 1018 were screened. Based on the title and abstract, 101 articles were further detailed evaluated. Then 52 articles were excluded and 49 RCTs (9422 participants) with 29 published in English (7, 30-57) and 20 in Chinese (58-77) were included in the final review (Table S2 ).