Ren Dianxu
Center for Research and Evaluation, School of Nursing, and Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA.
J Emerg Nurs. 2009 Jan;35(1):57-9. doi: 10.1016/j.jen.2008.09.020. Epub 2008 Dec 4.