Uji validitas dan reliabilitas dizziness handicap inventory adaptasi bahasa indonesia sebagai alat ukur evaluasi kualitas hidup pasien gangguan keseimbangan : kajian di poliklinik neurotologi THT-KLl RSUPN Dr. Cipto Mangunkusumo = Cross cultural adaptation validity and reliability test of the Indonesian version of dizziness handicap inventory as a quality of life tool evaluation of patients with balance disorder : a study in neurotology division ENT department at Cipto Mangunkusumo Hospital