I think you’re right @jarjarbinx. Tsuji is the only researcher who appears to have the knowledge, the ideas, the capacity and the funding to develop a real cure.
Terskykh has the knowledge, but not the financing (I fault Sanford Burnham for this.)
Replicel appears to have a faulty method and poor results… not to mention that, they’re financially failing as well.
Follica basically has nothing but a website and a hollow marketing plan for a device… If they could couple that device with a drug that could safely grow lots of hair, they’d have announced it a long time ago. That is proof - they seem to be nothing but a biotech shell company being used as a sophisticated investment vehicle for Daphne Zohar and her team of MBA’s, using Cotsarelis’ name to attract money and attention to their larger PureTech Ventures portfolio, most of which has nothing to do with hair.
Histogen has something, they’ve proven they can grow hair, but will require many repeated injections over the course of your life for maintenance, and probably more treatments than they’ve determined are safe as a baseline, to get anything approaching good results… and there’s no guarantee that the FDA will deem multiple treatments in a short period are safe. They might be approved much earlier in Asia, but that would mean you’d have to fly to Asia just to get a temporary treatment and keep going back for maintenance.
As for the Germans, Lauster et al., they seem to have stalled in their research to create follicles.
Dr. Kemp and HairClone is a wild card. Dr. Kemp is very smart and has a great overall business plan, but they seem to be self-funding with no major outside investors, and their idea of using cell banking to bootstrap the enterprise financially will probably not yield huge revenues. Except for the wealthy, patients will want to see some promise of results before they make that expenditure.