Health (5) Salud (4) Quality control (3) Mexicans (3) Laboratories (3) Mexicanos (3) Laboratorios (3) Control de calidad (3) Clinical chemistry laboratories (2) Zero (The number) (2) Health facilities (2) Evaluation (2) Evaluación (2) Laboratorios clínicos (2) Datos (2) Servicios de salud (2) Cero (Número) (2) carré (1) santé (1) Mexique (1) Nurses (1) Methods (1) Programs (1) Newborn infants--Medical care (1) Labor (1) Palliative treatment (1) Minors (1) Origin (1) Newborn infants--Death (1) Youth (1)