1. Department of Health Services Research and Administration, College of Public Health; University of Nebraska Medical Center; Omaha Nebraska
2. Department of Biostatistics, College of Public Health; University of Nebraska Medical Center; Omaha Nebraska
3. Department of Biostatistics, School of Public Health, University of Texas Health Science Center at Houston; Austin Regional Campus; Austin Texas
4. Department of Physiological and Technological Nursing, College of Nursing; Augusta University; Augusta Georgia
5. Department of Geography; University of Utah; Salt Lake City Utah