Zhong, Y.; Wang, X.; Xu, G.; Mao, B.; Zhou, W.; Min, J.; jiang, H.; Diao, X.; Fu, J. MODIFIED YUPINGFENG FORMULA FOR THE TREATMENT OF STABLE CHRONIC OBSTRUCTIVE PULMONARY DISEASE: A SYSTEMATIC REVIEW OF RANDOMIZED CONTROLLED TRIALS. Afr J Tradit Complement Altern Med 2013, 11, 1-14.