U.S. National Library of Medicine National Institutes of Health Varicose Veins Varicose veins at NIH http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002099/ http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002099/ http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002099/ http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002099/ http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002099/ http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0002099/ varicose veins