RT Journal Article SR Electronic T1 Virus Pneumonias JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 173 OP 183 VO 15 IS 4 A1 Sundgren, V. A1 Van Ordstrand, H. S. YR 1948 UL http://www.ccjm.org/content/15/4/173.abstract AB