Tan, Nichole Yue Ting, et al. “The Glutamate-Serine-Glycine Index As a Biomarker to Monitor the Effects of Bariatric Surgery on Non-Alcoholic Fatty Liver Disease ”. Journal of the ASEAN Federation of Endocrine Societies, vol. 39, no. 2, Sept. 2024, pp. 54-60, doi:10.15605/jafes.039.02.20.