New Article of Jiro Kishimoto
(Incubation Center, Regenerative Medicine Research & Business Development Section, Shiseido Co., Ltd, )
About Dermal Sheath Cup Cells to hair follicle Formation:
https://www.sciencedirect.com/science/article/pii/S0006291X19311611
Too bad its based on mice, but they also did some reconstituted human skin at least