Comparison of pain severity following video-assisted thoracoscopic sympathectomy: electric versus harmonic scalpels - Campos, José Ribas Milanez de; Wolosker, Nelson; Yazbek, Guilherme; Munia, Marco Antonio; Kauffman, Paulo; Puech-Leao, Pedro; Jatene, Fábio Biscegli (Interactive cardiovascular and thoracic surgery, 2010)