id	domain	url
brj-23699	www.ncbi.nlm.nih.gov	https://www.ncbi.nlm.nih.gov/books/nbk602022/
brj-23699	www.who.int	https://www.who.int/news/item/27-09-2016-who-releases-countryestimates-on-air-pollution-exposure-and-health-impact)