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