id	domain	url
commonwealth-192	dx.doi.org	http://dx.doi.org/10.15367/com.v20i2-3.192
commonwealth-192	www.cdc.gov	http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6450a3
commonwealth-192	dscholarship.pitt.edu	http://dscholarship.pitt.edu/29950/