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 ).