Internal validation and decision curve analysis of a preoperative nomogram predicting a postoperative complication in pheochromocytoma surgery: an international study - Phillips, John; Bloom, Jonathan; Yarlagadda, Vidhush; Schultz, Luciana; Gordetsky, Jennifer; Tanno, Fabio Y; Chambo, Jose L; Almeida, Madson Q; Fragoso, Maria C. B. V; Srougi, Miguel (International journal of urology, 2020)