Freezing medium containing 5% DMSO enhances the cell viability and recovery rate after cryopreservation of regulatory T cell products ex vivo and in vivo by Kaiser, D, Otto, NM, McCallion, O, Hoffmann, H, Zarrinrad, G, Stein, M, Beier, C, Matz, I, Herschel, M, Hester, J, Moll, G, Issa, F, Reinke, P, Roemhild, A