Simadibrata, M., Rani, A., Adi, P., Djumhana, A. and Abdullah, M. 2011. The gastro-esophageal reflux disease questionnaire using Indonesian language: A language validation survey. Medical Journal of Indonesia. 20, 2 (May 2011), 125-30. DOI:https://doi.org/10.13181/mji.v20i2.442.