1. Christine Helfrich, MS, OTR/L, is Research Specialist in Behavioral Sciences, Department of Occupational Therapy, and a doctoral student, School of Public Health, University of Illinois at Chicago, Chicago, Illinois 60612
2. Gary Kielhofner, DrPH, OTR, FAOTA, is Professor and Head, Department of Occupational Therapy, College of Associated Health Professions, and Professor, School of Public Health, University of Illinois at Chicago, Chicago, Illinois