1. Gurley, K. A. & Sanchez Alvarado, A. in StemBook. (eds Eggan, K. & Daley, G.) (Harvard Stem Cell Institute: Cambridge, MA, 2008).
2. Brignier, A. C. & Gewirtz, A. M. Embryonic and adult stem cell therapy. J. Allergy Clin. Immunol. 111, S745–S753 (2003).
3. Khanlarkhani, N. et al. Multipotent stem cell and reproduction. J. Stem Cells 11, 219–229 (2016).
4. Slack, J. M. W. What is a stem cell? Wiley Interdiscip. Rev. Dev. Biol. 7, e323 (2018).
5. Goss, R. J. Tumor-like growth of antlers in castrated fallow deer: an electron microscopic study. Scanning Microsc. 4, 715–720 (1990).