Table 2.

Summary of ethical approval in studies that reported the collection of UCB from human and animal subjects.

Ethics	Reference
	Yes	No
Informed consent from UCB donors	[20, 37, 58, 65–67, 69, 70, 73]	[71, 72]
Approval from animal ethics committee	[75, 80, 84, 85]	[76–78, 82, 83]