1. Department of Dermatology; University of Texas Southwestern Medical School; 5323 Harry Hines Blvd. Dallas TX 75390-9096 U.S.A
2. ProPath Associates; Dallas TX U.S.A
3. Department of Clinical Science; University of Texas Southwestern Medical School; 5323 Harry Hines Blvd. Dallas TX 75390-9096 U.S.A