Decreased serum levels of adiponectin are a risk factor for the progression to type 2 diabetes in the Japanese Population: the Funagata study. - Daimon,M.; Oizumi,T.; Saitoh,T.; Kameda,W.; Hirata,A.; Yamaguchi,H.; Ohnuma,H.; Igarashi,M.; Tominaga,M.; Kato,T. (Diabetes Care, 2003)