RT Journal Article SR Electronic T1 Primary lung abscess JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 3 OP 13 VO 42 IS 1 A1 Gopalakrishna, K. V. A1 Lerner, Phillip I. YR 1975 UL http://www.ccjm.org/content/42/1/3.abstract AB