Clinical presentation of cystic fibrosis at the time of diagnosis: a multicenter study in a region without newborn screening - FARAHMAND, Fatemeh; KHALILI, Manijeh; SHAHBAZNEJAD, Leila; HIRBOD-MOBARAKEH, Armin; NAJAFI SANI, Mehri; KHODADAD, Ahmad; MOTAMED, Farzaneh; REZAEI, Nima (Turkish Journal of Gastroenterology, 2013)