id	domain	url
dpc-1475	doi.org	https://doi.org/10.5826/dpc.1102a30
dpc-1475	www.cancer.org	https://www.cancer.org/content
dpc-1475	gis.cdc.gov	https://gis.cdc.gov/cancer/uscs/dataviz.html
dpc-1475	www.nea.org	http://www.nea.org/home/34765.htm
dpc-1475	www.aafp.org	https://www.aafp.org/medical-school-residency