- Correspondence to: Hsien-Hsien Chiang Associate Professor, Faculty of Nursing, National Yang-Ming University, No. 155, Li-Nong St Sec. 2, Pai Tou, Taipei, Taiwan 112;
- Received March 25, 2003
- Accepted April 14, 2004
- Revised October 6, 2003
- First published February 28, 2005.
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