RT Journal Article SR Electronic T1 Evaluation of Cushing disease: cavernous or inferior petrosal sinus sampling? JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1245 OP 1246 VO 19 IS 7 A1 Calzolari, F YR 1998 UL http://www.ajnr.org/content/19/7/1245.abstract