Cognitive performance after postoperative pituitary radiotherapy: a dosimetric study of the hippocampus and the prefrontal cortex. - Brummelman P; Sattler MG; Meiners LC; Elderson MF; Dullaart RP; van den Berg G; Koerts J; Tucha O; Wolffenbuttel BH; van den Bergh AC; van Beek AP (European journal of endocrinology, 2012)