Ariga, R. A., Amelia, R., Astuti, S. B., Fajar, F. A. A., Ariga, S., Ariga, H. P. S., & Pane, N. K. (2022). Implementation of Lean Six Sigma in Improving Competitive Advantage through Patient Satisfaction and Nurse Resources to Face the Covid-19 Pandemic at USU Medan Hospital. Open Access Macedonian Journal of Medical Sciences, 10(G), 218–222. https://doi.org/10.3889/oamjms.2022.7888