Fig. 2

(a) CONSORT (Consolidated Standards of Reporting Trials) flow diagram of the study. (b) The number of participants randomized to each group by the waves. The numbers in parentheses denote the number of participants who completed this study.
(a) CONSORT (Consolidated Standards of Reporting Trials) flow diagram of the study. (b) The number of participants randomized to each group by the waves. The numbers in parentheses denote the number of participants who completed this study.