Retinol-Binding Protein 4 and Insulin Resistance in Lean, Obese, and Diabetic Subjects - Graham, T E; Yang, Q; Blüher, M; Hammarstedt, A; Ciaraldi, T P; Henry, R R; Wason, C J; Oberbach, A; Jansson, P-A; Smith, U; Kahn, B B (N Engl J Med, 2006)