id	keyword
agb-108	trade
agb-108	halal
agb-108	oic
agb-108	food
agb-108	countries
agb-108	et al
agb-108	halal food
agb-108	value
agb-108	religion
agb-108	model
agb-108	halal trade
agb-108	gravity
agb-108	doi
agb-108	certification
agb-108	beverage
agb-108	restriction
agb-108	nations
agb-108	non
agb-108	halal certification
agb-108	level
agb-108	economic