1 Nosocomial Infection Research Center, Isfahan University of Medical Sciences, Isfahan, Ira, Iran.
2 Infectious Diseases and Tropical Medicine Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
3 Health and Safety Executive Center, Mobarakeh Steel Company, Isfahan, Iran.
4 Emergency Center, Mobarakeh Steel Company, Isfahan, Iran.
5 Occupational Health Center, Mobarakeh Steel Company, Isfahan, Iran.
6 Department of Physiology, Applied Physiology Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran.