Moradzadeh Khiavi, M., Haghi Ashtiani, M.T., Kharazi-Fard, M.J. and Hosseinzadeh, P. 2020. Frequency of head and neck masses in the Iranian infants during a 21-year period. Journal of Pediatric and Neonatal Individualized Medicine (JPNIM). 9, 2 (Oct. 2020), e090210. DOI:https://doi.org/10.7363/090210.