Ying-Hui Wu1, Chien-Chih Chen1, Tai-Yin Wu2. 1. Department of Family Medicine, Renai Branch, Taipei City Hospital, Taipei City, Taiwan. 2. Department of Family Medicine, Renai Branch, Taipei City Hospital, Taipei City, Taiwan; Institute of Epidemiology and Preventive Medicine, National Taiwan University, Taipei City, Taiwan. Electronic address: DAA77@tpech.gov.tw.