RT Journal Article SR Electronic T1 Bilateral spontaneous pneumothorax in nongestational choriocarcinoma JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 830 OP 831 VO 120 IS 7 A1 R. P. Stevens A1 T. H. Peirce A1 P. C. Dooley A1 G. H. Parsons YR 1979 UL http://www.cmaj.ca/content/120/7/830.abstract