1. Department of Ophthalmology, Universiti Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latiff, Bandar Tun Razak, Cheras, Kuala Lumpur, Malaysia
2. Department of Ophthalmology, Sunway Medical Centre Jalan Lagoon Selatan, Bandar Sunway, Petaling Jaya, Selangor, Malaysia
3. Department of Paediatrics, Universiti Kebangsaan Malaysia Medical Centre, Jalan Yaacob Latiff, Bandar TunRazak, Cheras, Kuala Lumpur, Malaysia
4. Singapore Eye Research Institute, Singapore National Eye Center, 11 Third Hospital Avenue, Singapore
5. Yong Loo Lin School of Medicine, National University of Singapore, Singapore