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Heydari, ST and Lankarani, KB and Vossoughi, M and Javanmardi, K and Sarikhani, Y and Mahjoor, K and Mahmoodi, M and Khabaz Shirazi, M and Akbari, M (2016) The prevalence and effective factors of crash helmet usage among motorcyclists in Iran. J Inj Violence Res, 8 (1). pp. 1-5.