Ahmadi, M. Foozonkhah, S. Shahmoradi, L. Mahmodabadi, A.D. 2016 11 The present descriptive comparative study was conducted to give an overview of the messaging standards that are necessary for interoperable electronic health records EHRs . We designed a preliminary model after data collection and compared the messaging standards of Health Level Seven HL7 and the International Organization for Standardization ISO . The data were assessed with the Delphi technique. A comprehensive model for the messaging standards of EHRs in the Islamic Republic of Iran was presented in three pivots: structural characteristics ...