Question 4 and 5) Dr. Jeff Biernaskie from Canada (see http://www.hairlosscure2020.com/the-university-of-calgary-hair-loss-research/) and a company called Replicel (also from Canada — see http://replicel.com/product-pipeline/rch-01-hair-regeneration/) have both done work on dermal sheath cup cells. Can you describe the difference in working with dermal sheath cup cells versus dermal papilla cells?
Why are some researchers focusing on the former, and some on the latter?