1. Paediatric Ophthalmology and Strabismus Services Dr. R. P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences New Delhi India
2. Drs Iribarren Eye Consultants Buenos Aires Argentina
3. Visual Optics Lab Antwerp (VOLANTIS), Faculty of Medicine and Health Science University of Antwerp Antwerp Belgium
4. Department of Ophthalmology Antwerp University Hospital Edegem Belgium