_:vb50949480 . _:vb50949480 "url:http://www.merckmanuals.com/professional/genitourinary_disorders/renal_transport_abnormalities/renal_tubular_acidosis_rta.html"^^ . _:vb50949480 . _:vb50949480 . _:vb50949480 . _:vb50949480 . _:vb50949480 . _:vb50949480 "A renal tubular transport disease characterized by excess levels of acid in the blood, due to a failure of the kidneys to appropriately acidify the urine."^^ . _:vb50949480 "url:http://en.wikipedia.org/wiki/Renal_tubular_acidosis"^^ .