TCF7L2 polymorphisms modulate proinsulin levels and beta-cell function in a British Europid population. Loos RJ, Franks PW, Francis RW, Barroso I, Gribble FM, Savage DB, Ong KK, O'Rahilly S, Wareham NJ Diabetes. Apr 2007 (DOI : 10.2337/db07-0055)