January 2011 in “Medical Journal of National Defending Forces in Northwest China” This study found that hypodermic injections of human dermal papilla cells conditioned medium led to hair regrowth in women with androgenetic alopecia, with an effective rate of 83.33%.
January 2009 in “Chinese Journal of Aesthetic Medicine” This study found that treatment with human dermal papilla cells conditioned medium resulted in an 81.25% total effective rate and a 62.50% cure rate for androgenetic alopecia.
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January 2000 in “Hormone Research in Paediatrics” This study suggests that the paradoxical effects of androgens on hair growth are due to differential gene expression in hair follicles, possibly established during embryogenesis.