Published on in Vol 6, No 4 (2018): April
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/9311, first published
.

1 Nursing Department, Medical School, Xiamen University, Xiamen, China
2 School of Nursing and Midwifery, Faculty of Health and Medcine, University of Newcastle, Newcastle, Australia
3 Zhongshan Hospital, Xiamen University, Xiamen, China