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Department of Dermatology, Columbia University, New York, NY, United States
Department of Dermatology, Niigata University School of Medicine, Niigata, Japan
aDepartments of Dermatology, Columbia University, New York, NY, United States
bDepartment of Genetics & Development, Columbia University, New York, NY, United States
Correspondence address: Department of Dermatology, Columbia University, College of Physicians & Surgeons, 630 West 168th Street VC-15, New York, New York 10032, United States. Tel.: +1 212 305 9565; fax: +1 212 305 7391.