1 Division of Dermatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California. Electronic address: [email protected].
2 Division of Dermatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California.
3 Department of Internal Medicine, Division of Gastroenterology, Harbor-UCLA Medical Center, Torrance, California.
4 Department of Internal Medicine, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California.