1. Departamento de Genética del Desarrollo y Fisiología Molecular Instituto de Biotecnología Universidad Nacional Autónoma de México Cuernavaca México
2. CITMER Ciudad de México México
3. American Center for Reproductive Medicine Cleveland Clinic Cleveland USA
4. Department of Metabolism Digestion and Reproduction, Imperial College London London UK
5. Department of Medical Bioscience University of the Western Cape Bellville South Africa