issue 4 publication date 2020-02

• Investigation of the Benzene Concentration and Distribution in Tehran Using Geographic Information System Modelling
• Prediction of the Academic Buoyancy and Academic Performance of Health Students at Semnan University of Medical Sciences Based on Their Perception of the Learning Environment
• Head Lice Contamination with Emphasis on Effective Therapeutic Methods in Schoolchildren in Mashhad, Iran, during 2017-2018
• Relationship between Cognitive Status and Medication Adherence among Elderly Patients with Hypertension
• Concentration Evaluation and Health Risk Assessment of Welders' Exposure to Total Fumes and Manganese during Welding at Metal Industry
• Effect of Multimedia Education on Eye Care Performance and Perception of the Disease in Type 2 Diabetic Patients Referred to Birjand Diabetic Clinic
• Comparasion of Photochemical Oxidation Process Efficiency Based on Hydrogen Peroxide and Persulfate for the Removal of Paraquat from Aqueous Solutions
• Challenges of the Execution of Hospital Accreditation in Iran: A Critical Review