<qa>  What is the diagnostic utility of narrow band imaging magnifying endoscopy in clinical practice?12. Ang TL, Fock KM, Teo EK, Tan J, Poh CH, Ong J, Ang D. The diagnostic utility of narrow band imaging magnifying endoscopy in clinical practice in a population with intermediate gastric cancer risk. Eur J Gastroenterol Hepatol. 2012;244:362-7Lin BR, Shun CT, Wang TH, Lin JT. Endoscopic diagnosis of intestinal metaplasia of stomach: accuracy judged by histology. Hepatogastroenterology 1999;46:162-166. 