1. National Nursing Centers Consortium, Philadelphia, Pennsylvania.
2. Take Care Health Systems, Conshohocken, Pennsylvania.
3. American College of Nurse Practitioners, and University of New Mexico College of Nursing, Albuquerque, New Mexico.
4. American Academy of Nurse Practitioners, and Pennsylvania State University School of Nursing, University Park, Pennsylvania.
5. Department of Health Policy, Jefferson Medical College, Philadelphia, Pennsylvania.