title: Saphenous vein or PTFE grafts in secondary access surgery?
mesh_terms: D000328:Adult; D000368:Aged; D001166:Arteriovenous Shunt, Surgical; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011138:Polytetrafluoroethylene; D006435:Renal Dialysis; D012501:Saphenous Vein / Q000637:transplantation*
chemical_list: D011138:Polytetrafluoroethylene