1. Advanced Reproductive Centre, Faculty of Medicine (ARC) , National University of Malaysia (UKM) , Kuala Lumpur , Malaysia
2. Reproductive Unit , Hospital Tuanku Azizah (HTA) , Kuala Lumpur , Malaysia
3. Department of Obstetrics and Gynaecology, Faculty of Medicine, Universiti Teknologi MARA (UiTM) , National University of Malaysia (UKM) , Selangor , Malaysia
4. Department of Obstetrics and Gynaecology, Faculty of Medicine , National University of Malaysia (UKM) , Kuala Lumpur , Malaysia