1. Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada.
2. Shiraz HIV/AIDS Research Center, Institute of Health, Shiraz University of Medical Sciences, Shiraz, Iran.
3. Department of Nutrition, Shiraz University of Medical Sciences School of Nutrition and Food Sciences, Shiraz, Iran.
4. Department of Physical Therapy, Shiraz University of Medical Sciences School of Rehabilitation Sciences, Shiraz, Iran.
5. Department of Epidemiology, Student Research Committee, Shiraz University of Medical Sciences School of Health, Shiraz, Iran.