Fang-Yih Liaw1, Ching-Fu Huang, Yu-Cheng Wu, Bai-Yao Wu. 1. Department of Family and Community Health, Tri-Service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Chenggong Rd, Neihu District, Taipei City 114, Taiwan, ROC. qqmug2000@hotmail.com