Check this box if the study is a companion to a main study and has a different protocol number. If this field is checked, then the protocol can be selected as a companion study in the Correlates & Companions tab for other protocols.

Designating companions to a protocol indicates that the protocol's subjects can or must enroll in the companion. Subjects can be registered to companion studies from the CRA Console > Register Subject page or through the Subject Console > Protocols page.

Not required

Contact Clinical Trial Application Support Help Desk prior to using Companions.