JUAN CHEN, YAN CHEN, PING CHEN, ZHIJUN LIU2, HONG LUO and SHAN CAI2.Effectiveness of individual counseling for smoking cessation in smokers with chronic obstructive pulmonary disease and asymptomatic smokers. EXPERIMENTAL AND THERAPEUTIC MEDICINE,2014,7:716~720. DOI: 10.3892/etm.2013.1463