id	domain	url
dpc-2252	doi.org	https://doi.org/10.5826/dpc.1204a190
dpc-2252	creativecommons.org	https://creativecommons.org/licenses/by-nc/4.0/
dpc-2252	www.clinicaltrials.gov	https://www.clinicaltrials.gov
dpc-2252	nccam.nih.gov	http://nccam.nih.gov/