1–4 hair grafts.
Follucular Unit Transplantation--surgically removed grafts containing 1-4 hair follicles that are genetically resistant to balding (from the back of the scalp) to be transplanted to a balding area
Color Atlas of Cosmetic Dermatology
Marc R. Avram, Sandy Tsao, Zeina Tannous, Mathew M. Avram
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