Nonoperative approach for symptomatic patients with chronic venous disease: results from the VEIN Act program Vol 25• No. 2• 2018• P121-176 ISSN 1286-0107 Nonoperative approach for symptomatic patients with chronic venous disease: results from the VEIN Act program Jorge H. ULLOA, Daniel GUERRA, Luis G. CADAVID, Diego FAJARDO, Rubén VILLARREAL (Colombia) 123 Critical need for an iliofemoral venous obstruction classification system William A. MARSTON (USA) 129 How to prevent complications and side effects from sclerotherapy
