Diagnosis of cystic fibrosis with chloride meter (Sherwood M926S chloride analyzer®) and sweat test analysis system (CFΔ collection system®) compared to the Gibson Cooke method - Nagehan Emiralioğlu; Uğur Özçelik; Ebru Yalçın; Deniz Doğru; Nural Kiper (The Turkish Journal of Pediatrics)