Repeated transsphenoidal pituitary surgery (TS) via the endoscopic technique: A good therapeutic option for recurrent or persistent Cushing's disease (CD) - Wagenmakers, M A; Netea-Maier, R T; van Lindert, E J; Timmers, H J; Grotenhuis, J A; Hermus, A R (Clin Endocrinol (Oxf), 2009)