1. School of Nursing, National Yang-Ming University, Taiwan, No. 155, Sec 2, Linong Street, Beitou District, Taipei, Taiwan
2. Division of Family Medicine, Taipei City Hospital, Yangming Branch, No. 105, Yusheng St., Shilin District, Taipei City, Taiwan
3. Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor, MI, USA