Department of Pathology, University of California San Diego, La Jolla, California, USA.|Department of Pathology, University of California San Diego, La Jolla, California, USA.|Department of Pathology, University of California San Diego, La Jolla, California, USA.|Department of Pathology, University of California San Diego, La Jolla, California, USA.|Department of Pathology, University of California San Diego, La Jolla, California, USA.|Department of Pathology, University of California San Diego, La Jolla, California, USA.