Uji validitas, uji reliabilitas dan uji diagnostik informant questionnaire on cognitive decline in the elderly-short version (IQCODE-S) versi bahasa Indonesia sebagai skrining gangguan kognitif ringan pada lanjut usia = Validity, reliability and diagnostic test of informant questionnaire on cognitive decline in the elderly-short version(IQCODE-S)-Indonesian version as mild cognitive impairment screening test in the elderly / Rahmi Ulfah