1. Instituto Mexicano de Oftalmología Circuito Exterior Estadio Corregidora S/N; Querétaro Querétaro Mexico
2. Department of Ophthalmology; Hamilton Eye Institute; University of Tennessee Health Science Center; Memphis Tennesee USA
3. HelpMeSee; New York New York USA
4. Independent Consultant in Prevention of Blindness; Tapachula Chiapas Mexico