[1] George Washington Univ, Sch Med, Dept Dermatol, 2150 Penn Ave,Suite 2B-425, Washington, DC 20037 USA
[2] Northwestern Univ, Feinberg Sch Med, Dept Dermatol, Chicago, IL USA
[3] Pk Nicollet Hlth Serv, Dept Dermatol, Minneapolis, MN USA
[4] Univ Minnesota, Dept Dermatol, Minneapolis, MN 55455 USA
[5] Minneapolis Vet Affairs Med Ctr, Dept Dermatol, Minneapolis, MN USA
[6] Univ Toronto, Sunnybrook Hlth Sci Ctr, Div Dermatol, Toronto, ON, Canada
[7] Univ Calif San Francisco, Dept Dermatol, San Francisco, CA 94143 USA
[8] Columbia Univ, Irving Med Ctr, Dept Dermatol, New York, NY 10027 USA
[9] Dartmouth Hitchcock Med Ctr, Dept Dermatol, Lebanon, NH 03766 USA
[10] Cleveland Clin, Dept Dermatol, Cleveland, OH 44106 USA
[11] McGill Univ, Montreal Gen Hosp, Div Dermatol, Montreal, PQ, Canada
[12] Univ Colorado, Dept Dermatol, Aurora, CO USA
[13] Laval Univ, Ctr Hosp Univ Quebec, Div Dermatol, Quebec City, PQ, Canada
[14] Duke Univ, Med Ctr, Dept Dermatol, Durham, NC USA
[15] Univ Wisconsin, Sch Med & Publ Hlth, Dept Dermatol, Madison, WI USA
[16] Keck Sch Med, Dept Dermatol, Los Angeles, CA USA
[17] Univ Ottawa, Div Dermatol, Ottawa, ON, Canada
[18] Univ Louisville, Div Dermatol, Louisville, KY 40292 USA
[19] Ohio State Univ, Dept Dermatol, Columbus, OH 43210 USA
[20] Penn State Univ, Dept Dermatol, Hershey, PA USA