CD44 and posterior cortical atrophy: Our methods for PCa-MSC isolation and culture were effective, since the cells showed a phenotype of CD34−/CD45− [not hematopoietic cells (18,19)], CD44+/CD73+/CD105+/CD90+ [mesenchymal stromal cell and stem cell markers (20–22)] and CD14−/MHC-II− [not endothelial progenitor cells (21–23)].