1. School of Humanities and Social Sciences, Xi ’an Jiaotong University, Xi ’an, Shaanxi, China
2. School of Normal Education, Longyan University, Longyan, Fujian, China
3. Department of Pediatrics, Women and Infants Hospital of Rhode Island-Warren Alpert Medical School of Brown University, Providence, RI, USA
4. Department of Nursing, Fujian Medical University Union Hospital, Fuzhou, Fujian, China