1. Department of Doctoral Studies, Institute of Health Research, School of Nursing, Azusa Pacific University, 606 E Huntington Dr., Room 235, Monrovia, CA 91016, USA
2. Departments of Public Health and Doctoral Studies, Institute of Health Research, School of Nursing, Azusa Pacific University, San Diego, CA 92108, USA
3. Department of Nursing, California State University, San Bernardino, CA 92407, USA
4. Department of Mathematics, Physics, and Statistics, Azusa Pacific University, Azusa, CA 91702, USA