[1] Guys Kings Coll, St Johns Inst Dermatol, Genet Skin Dis Grp, London, England
[2] St Thomas Hosp, Sch Med, London, England
[3] Columbia Univ, Dept Dermatol, New York, NY 10027 USA
[4] Columbia Univ, Dept Genet & Dev, New York, NY 10027 USA
[5] Hebrew Univ Jerusalem, Hadassah Med Ctr, Dept Human Genet, IL-91120 Jerusalem, Israel
[6] Hebrew Univ Jerusalem, Hadassah Med Ctr, Dept Dermatol, IL-91120 Jerusalem, Israel