1. Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan
2. Department of Metabolic Preemptive Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
3. Kitakanto obesity and metabolic research institute, Midori 379-2311, Japan
4. Departments of Medicine and Molecular Pharmacology, Albert Einstein College of Medicine, NY, USA