Table 1. Human skin biopsies.

Age	Body site	Number of Subjects
Newborn	Foreskin	8 M
22 to 46	Breast	6 F
30 to 55	Face (cheek, forehead, scalp, ear, nose) Leg	8 F/10 M
56 to 70	Face (temple, cheek, forehead, scalp, ear, nose)	17 F/10 M
56 to 70	Neck, chest, Leg, back, hand	5 F/6 M
71 to 97	Face (temple, cheek, forehead, scalp, ear, nose)	26 F/33 M
71 to 97	Neck, chest, arm, Leg, back, hand	10 F/11M

Classification of the skin biopsies originating from different body sites of unaffected individuals and collected at the Dermatology Department in accordance with the Columbia University Board protocols on human subject protection.

Total# 150 Samples