Open Peer Review on Qeios ## Group National Cancer Institute ## Source National Cancer Institute. Group. NCI Thesaurus. Code C43359. A group is a collection of any number of entities (members) considered as a unit.Open Peer Review on Qeios ## Group National Cancer Institute ## Source National Cancer Institute. Group. NCI Thesaurus. Code C43359. A group is a collection of any number of entities (members) considered as a unit.