Long-term effect of the Internet-based glucose monitoring system on HbA1c reduction and glucose stability: a 30-month follow-up study for diabetes management with a ubiquitous medical care system - Cho, JH; Chang, SA; Kwon, HS; Choi, YH; Ko, SH; Moon, SD; Yoo, SJ; Song, KH; Son, HS; Kim, HS; Lee, Wc; Cha, BY; Son, HY; Yoon, KH (Diabetes Care, 2006)