[Orthotoluidine reaction for blood in the feces].
D005243:Feces; D006801:Humans; D008551:Melena / Q000175:diagnosis*; D014050:Toluene; D014052:Toluidines
D014052:Toluidines; D014050:Toluene; C023622:2-toluidine
MELENA/diagnosis; TOLUENE