RT Journal Article SR Electronic T1 Endoscopic transphenoidal hypophysectomy – personal experience of the development of a new surgical technique JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 365 OP 365 DO 10.7861/clinmedicine.9-4-365 VO 9 IS 4 A1 H Ian Sabin YR 2009 UL http://www.rcpjournals.org/content/9/4/365.abstract