Nonsteroid drug selectivities for cyclo-oxygenase-1 rather than cyclo-oxygenase-2 are associated with human gastrointestinal toxicity: a full in vitro analysis. - Warner,TD.; Giuliano,F.; Vojnovic,I.; Bukasa,A.; Mitchell,JA.; Vane,JR. (Proc Natl Acad Sci U S A, 1999)