1. Ferdows School of Paramedical and Health, Birjand University of Medical Sciences, Birjand, Iran
2. University of Pavia, Unit of Infectious and Tropical Diseases, IRCCS San Matteo Hospital Foundation, Pavia, Italy
3. Department of Medical-Surgical Nursing, Nasibeh School of Nursing and Midwifery, Mazandaran University of Medical Sciences, Sari, Iran
4. Student Research Committee, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
5. Section of Infectious Diseases, Department of Internal Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, USA