RT Journal Article SR Electronic T1 Intravenous or oral steroids: Which is better for acute exacerbations of asthma or COPD? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 365 OP 366 VO 69 IS 5 A1 Charles Emerman YR 2002 UL http://www.ccjm.org/content/69/5/365.abstract AB