Use of varenicline for more than 12 months for smoking cessation in heavy chronic obstructive pulmonary disease smokers unmotivated to quit: a pilot study

by Raúl H. Sansores, Alejandra Ramírez-Venegas, Rosario Arellano-Rocha, Valeri Noé-Díaz, Leonor García-Gómez, Oliver Pérez Bautista, Mónica Velázquez Uncal
Published 2016-10-01