30 citations
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June 1993 in “The Journal of Cell Biology” The oncoprotein causes abnormal hair growth without increasing skin cancer risk.
24 citations
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December 2013 in “Archives of Dermatological Research” 
14 citations
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July 2016 in “Anatomical Science International” The study suggests that the arrector pili muscle is important for hair health and its damage might contribute to hair loss.
2 citations
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November 1998 in “Journal of The European Academy of Dermatology and Venereology” Prednisone reduces organ mast cell infiltration but does not alter the abnormal appearance of mast cells in systemic mastocytosis.
January 2000 in “Medical Entomology and Zoology” 
121 citations
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January 1991 in “Acta dermato-venereologica” Terbinafine quickly builds up in skin and hair, staying effective for over 3 weeks.
92 citations
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May 2004 in “Journal of Investigative Dermatology” 27 citations
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July 1983 in “Journal of Investigative Dermatology” April 2008 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” The vitamin D receptor helps control hair growth and may protect against certain skin tumors.
27 citations
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July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology”