Prevention of type 2 diabetes mellitus by changes in lifestyle among subjects with impaired glucose tolerance - Tuomilehto, J; Lindstrom, J; Eriksson, JG; Valle, TT; Hamalainen, H; Ilanne-Parikka, P; Keinanen-Kiukaanniemi, S; Laakso, M; Louheranta, A; Rastas, M; Salminen, V; Uusitupa, M (N Engl J Med, 2001)