Wikimedia
Wikipedia: Klinefelter's Syndrome
Wikipedia entry for Klinefelter's Syndrome in both mammals and adults. Links are also given for additional information on related subjects.
Mayo Clinic
Mayo Clinic: Varicose Veins
Information about the causes and treatments of varicose veins. Includes sections on signs and symptoms, causes, risk factors, when to seek medical advice, diagnosis, complications, treatments, prevention, self-care, and complementary and...