Emergence of Pseudomonas aeruginosa cross-infection in children with cystic fibrosis attending an Iranian referral pediatric center - Ghazi, M; Khanbabaee, G; Fallah, F; Kazemi, B; Mahmoudi, S; Navidnia, M; Pourakbari, B; Bakhshi, B; Goudarzi, H (Iranian Journal of Microbiology)