1 Centre for Reproductive Health, Institute for Regeneration and Repair, The University of Edinburgh, Edinburgh BioQuarter, 4-5 Little France Drive, Edinburgh, EH16 4UU, UK. Electronic address: meaghan.griffiths@ed.ac.uk.
2 Center for Neuroscience and Cell Biology, Center for Innovative Biomedicine and Biotechnology, University of Coimbra, Coimbra, Portugal; ViraVector, Viral Vector for Gene Transfer Core Facility, University of Coimbra, Coimbra, Portugal; GeneT, Gene Therapy Center of Excellence Portugal, University of Coimbra, Coimbra, Portugal. Electronic address: rui.nobre@cnc.uc.pt.