research The In Vitro Use of the Hair Follicle Closure Technique to Study the Follicular and Percutaneous Permeation of Topically Applied Drugs 12 citations , March 2012 in “ATLA. Alternatives to laboratory animals” Hair follicles significantly affect the skin absorption of some drugs.
research Gravity position to prevent facial edema in hair transplantation 2 citations , May 2009 in “Hair transplant forum international” Keeping the head elevated for 1.5 days after hair transplant surgery helps prevent facial swelling.