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