RT Journal Article SR Electronic T1 Peripheral opacity on plain chest radiography JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 621 OP 624 DO 10.3949/ccjm.80a.13006 VO 80 IS 10 A1 Mohammed A. R. Chamsi-Pasha A1 Abdul Hamid Alraiyes A1 Ihsan Mamoun A1 M. Chadi Alraies YR 2013 UL http://www.ccjm.org/content/80/10/621.abstract AB