Use of a modified activated clotting time of blood.
D001778:Blood Coagulation Disorders / Q000175:diagnosis*; D001780:Blood Coagulation Tests; D001803:Blood Transfusion; D002648:Child; D002675:Child, Preschool; D006467:Hemophilia A / Q000175:diagnosis; D006801:Humans; D008297:Male; D008722:Methods