School of Nursing, Taipei Medical College, 250 Wu-Hsing Street, Taipei, 110, Taiwan
*Tel.: +886-2-2377-6229; fax: +886-2-2377-2842
E-mail: [email protected]
Submitted May 5, 1999; revised March 22, 2000; accepted March 28, 2000.
doi: 10.1016/S0304-3959(00)00303-1