I would love to know that too, as I am not getting treatment.
I was offered shots but they said it wouldn't regrow whats gone due to scarring, and that if I got in faster they could do it. The spot they were speaking of was 2 days old! I can't live like that, waking up with hair on my pillow, rush to the doctor and wonder if its already too late.
Sadly they would have to have a large case study, because there are so many types of Alopecia and so many different causes.
I also donot receive active treatment. Well not medically. I refuse to take steroids or use steroid based creams. I have had hair loss for 7-8 years. I would love to know why some peoples hair grows back, and others doesnt.
I think researchers should investigate other things like hormones, immune markers, even food intolerances or reactions...instead of bringing out new immuno suppressants.