1- Department of Health Education & Health Promotion, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran 
 2- Department of Health Services, Shahid Beheshti University of Medical Sciences Tehran, Iran 
 3- Health Metrics Research Center, Iranian Institute for Health Sciences Research, ACECR, Tehran, Iran , aramezankhani@sbmu.ac.ir
                    
                    
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                    Type of Study:  
Letter to Editor |
                    Subject: 
                    
● International Health  Received: 2018/01/29 | Accepted: 2018/06/19 | Published: 2018/06/26