1. Department of PathologyJoslin Diabetes CenterHarvard Medical SchoolBostonMassachusettsUSA
2. Schepens Eye Research Institute/Massachusetts Eye and Ear InfirmaryBostonMassachusettsUSA
3. Department of OphthalmologyJoslin Diabetes CenterHarvard Medical SchoolBostonMassachusettsUSA
4. Section on Integrative Physiology and MetabolismJoslin Diabetes CenterHarvard Medical SchoolBostonMassachusettsUSA