Comparison of 7- and 14-day first-line therapies including levofloxacin in patients with Helicobacter pylori positive non-ulcer dyspepsia - ERÇİN, Cemal Nuri; UYGUN, Ahmet; TOROS, Ahmet Burak; KANTARCIOĞLU, Murat; KİLCİLER, Güldem; POLAT, Zülfikar; Bağcı, Sait (Turkish Journal of Gastroenterology, 2010)