1. Universidad Nacional Mayor de San Marcos, Departamento de Ciencias Morfológicas, Lima, Perú.
2. Universidad Científica del Sur, Departamento de medicina, Lima, Perú.
3. Research Educational Center, University of Turin, Turin, Italy.
4. Centro Avanҫado de Cirurgia Ginecológica, Department of OBGYN, Faculty of Medicine, Curitiba, Brazil.
5. Academic Department of Nutrition, Faculty of Medicine, Universidad Nacional Mayor de San Marcos, Lima, Peru.