Spirometry: recommendations and procedure
Benítez-Pérez, Rosaura Esperanza; Torre-Bouscoulet, Luis; Villca-Alá, Nelson; Del-Río-Hidalgo, Rodrigo Francisco; Pérez-Padilla, Rogelio; Vázquez-García, Juan Carlos; Silva-Cerón, Mónica; Cid-Juárez, Silvia; Gochicoa-Rangel, Laura