title: [Limitations of secondary analysis of databases--reply].
authors.forename: Oscar
authors.initials: O
authors.lastname: Munares-García
authors.forename: Guillermo
authors.initials: G
authors.lastname: Gómez-Guizado
authors.forename: Juan
authors.initials: J
authors.lastname: Barboza-Del Carpio
authors.forename: José
authors.initials: J
authors.lastname: Sánchez-Abanto
mesh_terms: D000740:Anemia / Q000097:blood* / Q000453:epidemiology*; D005260:Female; D006454:Hemoglobins / Q000032:analysis*; D006801:Humans; D011247:Pregnancy; D011250:Pregnancy Complications, Hematologic / Q000097:blood* / Q000453:epidemiology*
chemical_list: D006454:Hemoglobins