Impaired beta-cell function and insulin sensitivity in Japanese subjects with normal glucose tolerance. - Kuroe,A.; Fukushima,M.; Usami,M.; Ikeda,M.; Nakai,Y.; Taniguchi,A.; Matsuura,T.; Suzuki,H.; Kurose,T.; Yasuda,K.; Yamada,Y.; Seino,Y. (Diabetes Res Clin Pract, 2003)