[1] Yale Univ, Sch Med, Howard Hughes Med Inst, New Haven, CT 06520 USA
[2] Ist Sci H San Raffaele, Internal Med Sect Nutr Metab, Milan, Italy
[3] Ist Sci H San Raffaele, Unit Clin Spect, Milan, Italy
[4] Yale Univ, Sch Med, Dept Internal Med, New Haven, CT 06510 USA
[5] Yale Univ, Sch Med, Dept Cellular & Mol Physiol, New Haven, CT 06510 USA