Siau, K., Li, J., Fisher, N., Mulder, C., & Ishaq, S. (2017). Intubation Failure During Gastroscopy: Incidence, Predictors and Follow-Up Findings. Journal of Gastrointestinal and Liver Diseases, 26(4), 339-344. https://doi.org/10.15403/jgld.2014.1121.264.isq