Graduate School of Biomedical Sciences, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America.|Graduate School of Biomedical Sciences, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America.|Graduate School of Biomedical Sciences, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America.|Graduate School of Biomedical Sciences, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America.|Graduate School of Biomedical Sciences, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America.