title: Peripheral venous incompetence and the urban terrain. The relationship of venous incompetence and flat surfaces, and a system for artificially varying the terrain.
mesh_terms: D004777:Environment; D005260:Female; D006801:Humans; D008297:Male; D014648:Varicose Veins / Q000209:etiology*; D014652:Vascular Diseases / Q000209:etiology*