Electronic Textbook of Dermatology, Internet Dermatology Society This textbook is targeted to an audience of trained clinical dermatologists. Treatments and techniques described herein should only be done under the supervision of a physician experienced in their proper application. The chief editor is Rhett Drugge, M.D., New York University and the managing editor is Heather A. Dunn, Internet Dermatology Society. Selected by: janetnel@usc.edu