Yu Zhang, PhD, RN, is Lecturer, Yangzhou University School of Medicine, Yangzhou, People's Republic of China.
Ping Bo, PhD, RN, is Professor, Yangzhou University School of Medicine, Yangzhou, People's Republic of China.
Xiangming Li, PhD, RN, is Professor, Yangzhou University School of Medicine, Yangzhou, People's Republic of China.
Correspondence to: Ping Bo, PhD, RN, Yangzhou University School of Medicine, No. 11 Huai Hai Road, Yangzhou 225001, People's Republic of China ([email protected]).
This study was supported by the funding from Jiangsu province, People's Republic of China (CXZZ12_0918) and Yangzhou University (Innovation Project of College Students).
Editorial support was provided by the Yangzhou University School of Medicine. The authors thank all Yangzhou women who participated in this study and the research staff, Liang Zhao and Wen Song. Special thanks to my husband Leo Fang for translation support.
The authors declare no conflict of interest.
Received October 17, 2012
Accepted April 21, 2013