Burnham Institute for Medical Research, La Jolla, CA, USA.|Burnham Institute for Medical Research, La Jolla, CA, USA.|Burnham Institute for Medical Research, La Jolla, CA, USA.|Burnham Institute for Medical Research, La Jolla, CA, USA.|Burnham Institute for Medical Research, La Jolla, CA, USA.|Burnham Institute for Medical Research, La Jolla, CA, USA.|Burnham Institute for Medical Research, La Jolla, CA, USA.|Burnham Institute for Medical Research, La Jolla, CA, USA.