1. Neuro-ophthalmology Department, Centro Medico Docente la Trinidad, Caracas, Venezuela
2. Neuro-ophthalmology Department, Unidad Oftalmológica de Caracas, AVAO Universidad de Los Andes, Caracas, Venezuela
3. Neuro-ophthalmology Department, Hospital Vargas Caracas, Caracas, Venezuela
4. Neuro-ophthalmology Department, Clinica Avila, Caracas, Venezuela
5. Neuro-ophthalmology Department, Neurovisión Especialidades Oftalmológicas, Barquisimeto, Venezuela