PerspectiveOnline now102858Open access Affiliations & Notes 1Department of Medical Ethics and Health Law, Leiden University Medical Center, Leiden, the Netherlands 2Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, the Netherlands 3hDMT, Institute for Human Organ and Disease Model Technologies, Leiden, the Netherlands 4Stem Cell Medicine, Murdoch Children’s Research Institute, Parkville, VIC, Australia 5Melbourne Medical School, University of Melbourne,...