I have had Varicose Vein tx with Varithena (foam sclerotherapy) injections. I have had 3 sessions with good results. I know new veins can develop anytime. My doc does not believe in Venaseal since no long term studies are available. Can I still be a candidate for Venaseal in the future? Does the Glue stay in the body forever? I have read articles that the glue works in GSV but no so well in SSV, is this true? Can yearly Varithena injections harm the body?