We will update the boundaries & relationships section from: "This Group resource - defines a group of specific people, animals, devices etc. by enumerating them, or by describing qualities that group members have. The group resource refers to other resources, possibly implicitly. Groups are intended to be acted upon or observed as a whole; e.g. performing therapy on a group, calculating risk for a group, etc. This resource will commonly be used for public health (e.g. describing an at-risk population), clinical trials (e.g. defining a test subject pool) and similar purposes." to "This Group resource - defines a group of specific people, animals, devices etc. by enumerating them, or by describing qualities that group members have. The group resource refers to other resources, possibly implicitly. Groups are intended to be acted upon or observed as a whole; e.g. performing therapy on a group, calculating risk for a group, etc. This resource will commonly be used for public health (e.g. describing an at-risk population), clinical trials (e.g. defining a test subject pool) and similar purposes.  It may also be used to represent patients, tribes or other collections of people or animals where all of the group members are either Patient or RelatedPerson.  In this latter case, a Group may also sometimes be an author, performer or other responsible entity."