1. Department of Obstetrics and Gynecology, Buddhist Tzu-Chi Buddhist General Hospital, Hualien, Taiwan
2. Graduate Institute of Medical Sciences, Tzu Chi University, Hualien, Taiwan
3. Stem Cell Laboratory, Department of Research, Buddhist Tzu Chi General Hospital, Hualien, Taiwan
4. Department of Pediatrics, Buddhist Tzu-Chi Buddhist General Hospital, Hualien, Taiwan
5. Department of Occupational Medicine, Buddhist Tzu-Chi General Hospital, Hualien, Taiwan