1. Department of Internal Medicine, Hospital de Especialidades “Dr. Antonio Fraga Mouret,” Centro Médico Nacional La Raza, México City, Mexico.
2. Division of Postgraduate Studies, Universidad Nacional Autónoma de México, México City, Mexico.
3. Research Division, Hospital de Especialidades “Dr Antonio Fraga Mouret,” México City, Mexico.
4. Translational Research Unit, Hospital de Especialidades Centro Médico La Raza, Universidad Nacional Autónoma de México, México City, Mexico.
5. Department of Pneumology Hospital General Dr. Gaudencio González Garza, Centro Médico La Raza, México City, Mexico.
6. Direction of Education and Research, Hospital de Especialidades “Dr Antonio Fraga Mouret,” México City, Mexico.