id	keyword
ejnm-31	study
ejnm-31	activity
ejnm-31	cholelithiasis
ejnm-31	control
ejnm-31	case
ejnm-31	disease
ejnm-31	patients
ejnm-31	erbil
ejnm-31	fat
ejnm-31	risk
ejnm-31	journal
ejnm-31	group