1. Research Unit of Obstetrics and Reproduction in Animals, Department of Obstetrics, Gynaecology and Reproduction, Faculty of Veterinary Sciences, Chulalongkorn University, Bangkok 10330, Thailand
2. Center for Species Survival, Smithsonian Conservation Biology Institute, National Zoological Park, Washington, DC 20013, USA
3. Wildlife Reproductive Innovation Center, Bureau of Conservation and Research, Zoological Park Organization under the Royal Patronage of H.M. the King, Bangkok, Thailand