Is Sympathectomy at T4 Level Better Than at T3 Level for Treating Palmar Hyperhidrosis? - Wolosker, Nelson; Yazbek, Guilherme; Ishy, Augusto; Campos, José Ribas M. de; Kauffman, Paulo; Puech-Leão, Pedro (Journal of Laparoendoscopic and Advanced Surgical Techniques - Part A, 2008)