8Nixon J A. Method for determining the activity state of hair follicle [ J ]. Biotechnic & Histochemistry, 1993,68 (6) : 316-325.
9Henderson M, Sabine J. Seasonal variation in the mitotic activity of secondary fibie follicles in adult cashmere goats [ J ]. Small Ruminant Research, 1992,6 : 329-345.
10Paus R, Cotsarelis G. The biology of hair follicles[J]. N Engl J Med, 1999, (41):491-497.