Long-Sheng Chen1, Yi-Ren Wang2. 1. Medical Review and Pharmaceutical Benefits Division, National Health Insurance Administration, Ministry of Health and Welfare, Taipei City, Taiwan, ROC; Office of Healthcare Quality Policy, Ministry of Health and Welfare, Taipei City, Taiwan, ROC. Electronic address: lschen@nhi.gov.tw. 2. Office of Healthcare Quality Policy, Ministry of Health and Welfare, Taipei City, Taiwan, ROC.