Mice were obtained from breeding colonies of the animal facilities of Charité–Universitätsmedizin Berlin and all animal experimentation were approved by the ethics committee of the state of Berlin, Landesamt für Gesundheit und Soziales (LAGeSo). Where indicated, engraftment of back skin was performed by intradermal injection of 106 BMCMCs (29, 30). Full details can be found in SI Appendix, SI Materials and Methods.
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