CONSORT checklist
Wakaba Iha
Click here for additional data file.The authors would like to thank Masaru Ochiai, Aya Unoki, Izumi Takeshita, and Wakaba Iha for their assistance in recruiting participants and for useful advice. The authors would also like to thank Kurumi Tsuruta and Yoshinori Fujii for their useful advice on data analysis and statistical tests.