Columbia subject headings:
Chronically ill--Care.
Patients--Social networks.
Social networks--Health aspects.
Social networks--Therapeutic use.
Harvard subject headings:
Chronically ill--Care.
Patients--Social networks.
Social networks--Health aspects.
Social networks--Therapeutic use.
Princeton subject headings:
Chronically ill--Care.
Patients--Social networks.
Social networks--Health aspects.
Social networks--Therapeutic use.