An International Society for Cell and Gene Therapy Mesenchymal Stromal Cells Committee editorial on overcoming limitations in clinical trials of mesenchymal stromal cell therapy for coronavirus disease-19: time for a global registry - Daniel J. Weiss; Anthony J. Filiano; Jacques Galipeau; Maroun Khoury; Mauro Krampera; Manoj M. Lalu; Katarina Le Blanc; Jan A. Nolta; Donald G. Phinney; Patrícia R. M. Rocco; Yufang Shi; Karin Tarte; et al. (2022)