Gunawan, M Yusuf, et al. “Sensitivity and Specificity Comparison Between APFEL, KOIVURANTA, and SINCLAIR Score As PONV Predictor In Post General Anesthesia Patient”. Qanun Medika - Medical Journal Faculty of Medicine Muhammadiyah Surabaya, vol. 4, no. 1, Jan. 2020, pp. 69-76, doi:10.30651/jqm.v4i1.2826.