1. Department of Advanced Nursing, University of Umeå, Box 1442, 901 24 Umeå, Sweden
2. Tel-Aviv University, Israel, at the time of the study. Now at WHO, Geneva, Switzerland.
3. Gerontological Nursing Consultant, Petersborough, Ontario, Canada.
4. University of California School of Nursing, San Francisco, California, USA.
5. University of Turku, Finland.
6. Chinese Nursing Association, Beijing.
7. University of Arizona, Tucson, USA.
8. La Trobe University, Australia.
9. Sunnybrook Medical Centre, Toronto, Canada.
10. Tel-Aviv University, Israel.