Practical Geriatrics
Study on the efficacy of ipratropium bromide combined with low molecular weight heparin calcium in elderly patients with chronic obstructive pulmonary disease and pulmonary heart disease
MA Xiao-yu, LI Peng-fei, TAI Na, ZHAO Yue, SU Jie-xue, AN Fu-cheng, SUO Shuang
Practical Geriatrics . 2022, (7): 680 -683 .  DOI: 10.3969/j.issn.1003-9198.2022.07.008