1. From the Institute of Biomedical Sciences, Academia Sinica, Nan-Kang, Taipei, Taiwan, ROC (W-TY, L-SH, and W-HP); the Center for Health Policy Research and Development, National Health Research Institutes, Zhunan, Taiwan, ROC (H-YC and Y-WW); the Department of Economics, National Tong-Hua University, Hualien, Taiwan, ROC (Y-WH); the Department of Statistics, National Cheng-Chi University, Taipei,