1. Department of Obstetrics & Gynaecology, Universiti Kebangsaan Malaysia Fakulti Perubatan, Pusat Perubatan UKM, Kuala Lumpur, Malaysia;
2. Department of Pathology, Universiti Kebangsaan Malaysia Fakulti Perubatan, Pusat Perubatan UKM, Kuala Lumpur, Malaysia;
3. Department of Physiology, Universiti Kebangsaan Malaysia Fakulti Perubatan, Pusat Perubatan UKM, Kuala Lumpur, Malaysia