Was the historic contribution of Spain to the Mexican gene pool partially responsible for the higher prevalence of type 2 diabetes in mexican-origin populations? The Spanish Insulin Resistance Study Group, the San Antonio Heart Study, and the Mexico City Diabetes Study. - Lorenzo, Carlos; Williams, Ken; Stern, Michel P.; Hazuda, Helen P.; Haffner, Steven M.; Serrano-Rios, Manel; Martinez-Larrad, Maria T.; Gabriel, Rafael; Gonzalez-Villalpando, Clicerio; Lorenzo, C; Serrano-Rios, M; Martinez-Larrad, M T; et al. (Diabetes Care, 2001)