The caBIGĀ® Central Clinical Participant Registry (C3PR) is an open source, web-based system that enables efficient and streamlined registration of participants into clinical trials. Component homepage: [https://cabig.nci.nih.gov/tools/c3pr] [http://trac.briccs.org.uk/query?status=accepted&status=assigned&status=new&status=reopened&component=C3PR&col=id&col=summary&col=component&col=status&col=type&col=priority&col=milestone&order=priority Active tickets]