The significance of fine needle aspiration biopsy in diagnosis of pancreatic lesions - YERCİ, Ömer; GÜREL, Selim; ÖZTÜRK, Hülya; DOLAR, Enver; ADIM, Şadıman Balaban; ORHAN, Bülent; EVRENSEL, Türkan; FİLİZ, Gülaydan (Turkish Journal of Gastroenterology, 1999)