Osteopontin attenuates aging‐associated phenotypes of hematopoietic stem cells - Novella Guidi; Mehmet Saçma; Ludger Ständker; Karin Soller; Gina Marka; Karina Eiwen; Johannes M. Weiss; Frank Kirchhoff; Tanja Weil; José A. Cancelas; Maria Carolina Florian; Hartmut Geiger (2017)