What approach is more promising for blood manufacturing? (poll 4544519)

What approach is more promising for blood manufacturing?

Hemoglobin-based oxygen carriers and synthetic bio(nano)materials

Adult stem cells (for example CD34+)

Enbryonic stem cells

Induced pluripotent stem cells (iPS)

Direct transdifferentiation by defined factors (for example from skin fibroblasts)

Equal combination of few mentioned methods

Manufacturing of artificial blood is utopia

Other:

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