1. Obstetrics and Gynecology Division, ABC Medical Center, I.A.P., Avenida Carlos Graef Fdez. 154, Santa Fe, 05300 Mexico City, Mexico
2. Colegio Mexicano de Ginecología y Obstetricia (COMEGO), Torre WTC, Montecito 38-29 Of. 21, Col. Nápoles, Benito Juárez, 03810 Mexico City, Mexico