Author Affiliations: School of Nursing, University of Pennsylvania, USA (Liu J); Department of Psychology, The Chinese University of Hong Kong, Hong Kong, China (Leung P); Department of Psychology, Nanjing Normal University, China (Sun R); Peking University Health Science Center, China (Li HT, Liu JM)

Corresponding Author: Jianghong Liu, PhD, University of Pennsylvania School of Nursing and Medicine, 418 Curie Blvd., Room 426, Claire M. Fagin Hall, Philadelphia, Pennsylvania 19104-6096, USA (Tel: (215) 898-8293; Email: jhliu@nursing.upenn.edu)

doi: 10.1007/s12519-011-0329-x