Assessment of Effective Risk Factors Leading to Musculoskeletal Disorders in Jobs of a Central Repair Workshop in an Oil Refinery using Relative Stress Index

a Instructor, Department of Occupational Hygiene, School of Public Health, Lorestan University of Medical Science, Lorestan, Iran b Instructor, Nutritional Health Research Center, Lorestan University of Medical Sciences, Khoramabad, Iran c Ph.D. Candidate, Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran d MSc Student, Department of Occupational Health Engineering, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran e Ph.D. Candidate, Department of Occupational Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran f MSc, Department of Occupational Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran