1. Shriners Hospital for Children, Mexico City, Av. del IMAN # 257, Col. Pedregal de Santa Ursula, Delegacion Coyoacan, México City, DF, CP 04650, Mexico.
2. Asociación Médica. Centro Medico ABC, Mexico City, Mexico and Sierra Nevada 234, Col. Lomas de Chapultepec, Delegacion Miguel Hidalgo, México City, DF, 11000, Mexico.