1. Department of Obstetrics and GynecologyChung Shan Medical University HospitalTaichung City Taiwan
2. Institute of MedicineChung Shan Medical UniversityTaichung City Taiwan
3. School of MedicineChun Shan Medical UniversityTaichung City Taiwan
4. Department of Public HealthFu Jen Catholic UniversityNew Taipei City Taiwan
5. College of Public HealthInstitute of Health Policy and ManagementNational Taiwan UniversityTaipei Taiwan