Chair-setting and varicose veins.
D000367:Age Factors; D002962:Civilization; D003094:Collagen / Q000378:metabolism; D004547:Elastic Tissue / Q000254:growth & development; D006801:Humans; D007700:Kinetics; D011187:Posture; D012501:Saphenous Vein / Q000502:physiology; D013314:Stress, Mechanical; D014648:Varicose Veins / Q000453:epidemiology / Q000209:etiology*; D014690:Venous Pressure
D003094:Collagen