1. Department of Speech and Language Pathology, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
2. Department of Psychology and Neurosciences, Leibniz Research Centre for Working Environment and Human Factors, Dortmund, Germany
3. Department of Public Health, Research Center for Environmental Contaminants, Abadan University of Medical Sciences, Abadan, Iran
4. Department of Basic Sciences in Rehabilitation, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
5. Department of Biostatistics, School of Public Health, Iran University of Medical Sciences, Tehran, Iran