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  1. Excluded Studies - Pharmacologic and Nonpharmacologic Therapies in Adult Patients With Exacerbation of COPD: A ... 
    https://www.ncbi.nlm.nih.gov/books/NBK549047
    ... of Chronic Bronchitis Patients (HL301: Mixed Extract of Rehmannia Glutinosa, Schisandra ... efficacy and safety of cardio-selective beta-receptor blocker in management ...