1. Institute of Hospital and Health Care Administration, College of Medicine, National Yang Ming Chiao Tung University , Taipei 112, Taiwan
2. Department of Health Law, Policy and Management, Boston University School of Public Health , Boston, MA 02118, United States
3. Medigen Vaccine Biologics Corporation , Taipei 114, Taiwan
4. Institute of Public Health, College of Medicine, National Yang Ming Chiao Tung University , Taipei 112, Taiwan
5. Office of the Deputy Superintendent, National Yang Ming Chiao Tung University Hospital , Yilan County 260, Taiwan
6. Takeda Vaccines , Cambridge, MA 02139, United States