RT Journal Article SR Electronic T1 Single port videothoracoscopy under epidural anesthesia for undiagnosed pleural effusions. An alternative approach. JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1082 OP 1084 VO 32 IS 10 A1 Yalcinkaya, Serhat A1 Vural, Ahmet H. A1 Ozyazicioglu, Ahmet F. YR 2011 UL http://smj.org.sa/content/32/10/1082.abstract AB