1. Kaeko Saeki, MA, MPH, OTR, is a research assistant for A. Jean Ayres, PhD, Torrance, CA 90501
2. Florence A. Clark, PhD, OTR, FAOTA, is Associate Professor, Department of Occupational Therapy, University of Southern California, Downey, CA 90242
3. Stanley P. Azen, PhD, is Professor of Biometry, Department of Preventive Medicine, University of Southern California School of Medicine, Los Angeles 90033