"ethgrp","01" "subjectkey","src_subject_id","interview_date","interview_age","sex","mat_grandfa_ethn1","mat_grandfa_ethn2","mat_grandma_ethn1","mat_grandma_ethn2","pat_grandfa_ethn1","pat_grandfa_ethn2","pat_grandma_ethn1","pat_grandma_ethn2","mat_grandfa_cntry","mat_grandma_cntry","pat_grandfa_cntry","pat_grandma_cntry"