1. School of Public HealthShahroud University of Medical Sciences Shahroud Iran
2. Neurology Research CenterKerman University of Medical Sciences Kerman Iran
3. Department of Occupational Health EngineeringSchool of Public HealthMazandaran University of Medical Sciences Mazandaran Iran
4. Mobility Impairment Research CenterHealth Research InstituteBabol University of Medical Sciences Babol Iran
5. Scientific Research CenterTehran University of Medical Sciences Tehran Iran
6. Institute for Environmental ResearchTehran University of Medical Sciences Tehran Iran