TABLE 1.

Inclusion and exclusion criteria.

Inclusion criteria	Exclusion criteria
Articles in the fields of regenerative medicine, tissue-engineering, 3D printing, cell-based therapy, organoid technology, synthetic biology and bio-artificial organs describing ethical points to consider (issues, questions, or challenges) for early-phase clinical trials	Letters to the editor
	Editorials
	Opinion articles
	Non-biological medical devices
	Engineering a specific tissue only for research purpose
	Describing ethical issues associated with pre-clinical research only