title: [Estrogen therapy in menopause. Clinical study in evolution (KEEPS) to explain the risk-benefit dispute to administration].
authors.affiliation: Unidad de Investigación Médica en Enfermedades Endocrinas, Diabetes y Metabolismo, Hospital de Especialidades, Centro Médico Nacional Siglo XXI, IMSS, México, DF. zaratre@att.net.mx
authors.forename: Arturo
authors.initials: A
authors.lastname: Zárate
authors.forename: Marcelino
authors.initials: M
authors.lastname: Hernández-Valencia