Serum retinol-binding protein is more highly expressed in visceral than in subcutaneous adipose tissue and is a marker of intra-abdominal fat mass - Kloting, N; Graham, T E; Berndt, J; Kralisch, S; Kovacs, P; Wason, C J; Fasshauer, M; Schon, M R; Stumvoll, M; Bluher, M; Kahn, B B (Cell Metab, 2007)