Ndraha S. Frequency Scale for the Symptoms of GERD Score for Gastroesophageal Reflux Disease in Koja Hospital. InaJGHE [Internet]. 2010 Jan. 8 [cited 2026 Oct. 22];11(2):75-8. Available from: https://www.ina-jghe.com/index.php/jghe/article/view/275