2022. Primary total knee arthroplasties under the Brazilian Public Health Unic System (SUS) - Number of procedures, regional distribution, hospitalization costs, average length of hospital stay and mortality (2012-2021). Research, Society and Development. 11, 5 (Apr. 2022), e38711528548. DOI:https://doi.org/10.33448/rsd-v11i5.28548.