1. Yvonne L. Munn Center for Nursing Research, Massachusetts General Hospital, Boston, Massachusetts, USA.
2. Treadwell Library, Massachusetts General Hospital, Boston, Massachusetts, USA.
3. William F. Connell School of Nursing, Boston College, Boston, Massachusetts, USA.
4. Mongan Institute, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.
5. Boston Health Care for the Homeless Program, Boston, Massachusetts, USA.
6. Metabolism Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA.