Erratum to 'Mesenchymal stromal cells tracking and cytokines kinetics following intra-articular and intravenous transplantation 27 (2019) S203–S204'. Issue 2 (February 2021) - Dias de Oliveira, F.B.; Antonioli, E.; Souza, J.G.; Metropolo Dias, O.F.; Ferretti, M.