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This is to certify that your paper entitled «Compare the prevalence of musculoskeletal disorders and its associated factors among farmers and city workers Agh Ghala : A cross-sectional study» was indexed with 1 pages, in the CIVILICA citation database, code COI:IHSC11_406, after evaluation and approval of the referees of the "the 11th university students conference on innovations in health sciences held in Tehran 2018.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.