Hair loss improved by light?

http://link.springer.com/article/10.1007/s40257-013-0060-6/fulltext.html

http://www.ncbi.nlm.nih.gov/pubmed/23924031

http://www.ncbi.nlm.nih.gov/pubmed/25662177

http://www.ncbi.nlm.nih.gov/pubmed/24873677