Typical symptoms rather than extraesophageal symptoms affect the quality of life in gastroesophageal reflux disease - Jung, Sung Hoon; OH, Jung-Hwan; JIE, Byung-Soo; OH, Seung-Hyun; KIM, Jin-Seok; JEON, Eun-Jung; CHOI, Myung-Gyu (Turkish Journal of Gastroenterology, 2012)