Quantification of the relationship between insulin sensitivity and β-cell function in human subjects. Evidence for a hyperbolic function - Kahn, S E; Prigeon, R L; McCulloch, D K; Boyko, E J; Bergman, R N; Schwartz, M W; Neifing, J L; Ward, W K; Beard, J C; Palmer, J P (Diabetes, 1993)