Cephalosporin-induced hypoprothrombinemia: possible role for thiol methylation of 1-methyltetrazole-5-thiol and 2-methyl-1,2,4-thiadiazole-5-thiol - Kerremans, A.L; Lipsky, J.J; van Loon, J; Gallego, M.O; Weishilboum, R.M (J Pharmacol Exp Ther, 1985)