1. Department of Dermatology and Skin Science; University of British Columbia; Vancouver British Columbia, Canada V5Z 4E8
2. Westlake Dermatology Clinical Research Center; Westlake Dermatology & Cosmetic Surgery; Austin Texas 78746
3. Goldman; Butterwick; Fitzpatrick; Groff & Fabi: Cosmetic Laser Dermatology; San Diego California 92121
4. Department of Dermatology; Naval Medical Center; San Diego California 92134