Analysis of co-morbidities of chronic obstructive pulmonary disease for patients in Yangpu District of Shanghai
CHENG Yi, HAN Xue, LUO Yong, et al
上海交通大学学报（医学版） . 2015, (1): 82 .  DOI: 11.3969/j.issn.1674-8115.2015.01.017