[1] UNIV CALIF BERKELEY, DEPT PHYSIOL ANAT, BERKELEY, CA 94720 USA
[2] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB, MEMBRANE BIOENERGET GRP, BERKELEY, CA 94720 USA
[3] UNIV CALIF BERKELEY, DEPT PHYS EDUC, EXERCISE PHYSIOL LAB, BERKELEY, CA 94720 USA
[4] UNIV CALIF SAN FRANCISCO, DEPT PEDIAT, SAN FRANCISCO, CA 94143 USA