Simplified Medication Adherence Questionnaire (SMAQ) for People Living With HIV in a National Hospital in Mexico: Instrument Validation Study - Luis Eduardo Del Moral Trinidad; Luz Alicia González Hernández; Jaime Federico Andrade Villanueva; Pedro Martínez-Ayala; Adriana Valle Rodríguez; Vida Veronica Ruíz Herrera; José Adán Vizcaíno Résendiz; Melva Guadalupe Herrera Godina; Sergio Dominguez-Lara (Interactive Journal of Medical Research)