[1] Kurume Univ, Sch Med, Dept Dermatol, Fukuoka, Japan
[2] Imperial Canc Res Fund, Keratinocyte Lab, London WC2A 3PX, England
[3] Keio Univ, Sch Med, Dept Dermatol, Tokyo, Japan
[4] Northwestern Univ, Sch Med, Dept Pathol, Chicago, IL 60611 USA
[5] Northwestern Univ, Sch Med, Dept Dermatol, Chicago, IL 60611 USA
[6] Northwestern Univ, Sch Med, RH Lurie Canc Ctr, Chicago, IL 60611 USA
[7] Johns Hopkins Univ, Sch Med, Dept Dermatol, Baltimore, MD 21205 USA