Randomized, Single Blind, Placebo Controlled, to Evaluate Efficacy and Safety of Polidocanol Injectable Foam for Treatment of Symptomatic, Visible Varicose Veins With SFJ Incompetence

1% polidocanol, up to 15 mL, one treatment session (initially up to 30 ml, reduced to up to 15 ml in Amendment #2)

10 u/mL normal heparinized saline solution, up to 20 mL, one treatment session