Reduced plasma visfatin/pre-B cell colony-enhancing factor in obesity is not related to insulin resistance in humans. - Pagano,C.; Pilon,C.; Olivieri,M.; Mason,P.; Fabris,R.; Serra,R.; Milan,G.; Rossato,M.; Federspil,G.; Vettor,R. (J Clin Endocrinol Metab, 2006)