Disse patienter blev inddelt i tre undergrupper: patienter, der var HDA- negative, patienter, der var positive med antistoftiter < 5 millienheder/ ml, og patienter, der var positive med antistoftiter > 5 millienheder/ ml.
These data were divided into 3 subgroups: patients with HDA negative, patients with positive antibodies< 5 mU/mL and patients with positive antibodies> 5 mU/ mL.