NAME	DESCRIPTION	LINK
Age at Study Day 0	Age Event is the Age at Study Day 0.	http://bioportal.bioontology.org/ontologies/OBI?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FPATO_0000011
Age at enrollment	Age Event is the Age at enrollment. In the case of a subject enrolled in multiple studies, this value is the minimum age for all the studies.	http://bioportal.bioontology.org/ontologies/OBI?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FPATO_0000011
Age at infection	Age Event is the Age at infection.	http://bioportal.bioontology.org/ontologies/OBI?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FPATO_0000011
Age at initial treatment	Age Event is the Age at initial treatment.	http://bioportal.bioontology.org/ontologies/OBI?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FPATO_0000011
Age at initial vaccine administration	Age Event is the Age at initial vaccine administration.	http://bioportal.bioontology.org/ontologies/OBI?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FPATO_0000011
Not Specified	Age Event is not specified or not received. If no Age Event value is received, then this is the system default value.	http://bioportal.bioontology.org/ontologies/OBI?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FPATO_0000011
Other	Age Event is some Other value not in CV Terms.	http://bioportal.bioontology.org/ontologies/OBI?p=classes&conceptid=http%3A%2F%2Fpurl.obolibrary.org%2Fobo%2FPATO_0000011
