“…13 In particular, the symptoms of heartburn, regurgitation, chest pain, cough, hoarseness, asthma, dysphagia, fullness, diarrhea, flatulence, constipation, belching, bloating, and distortion of taste were graded as none (0), once per week (1), several times per week (2), daily (3), and constantly (4). The intensity of the above symptoms was graded as none (0), mild (1), moderate (2), severe (3), and extremely severe (4).…”