Endothelial NO-Synthase Intron 4 Polymorphism is Associated with Disturbed In Vivo Nitric Oxide Production in Individuals Prone to Type 2 Diabetes - Rittig, K; Holder, K; Stock, J; Tschritter, O; Peter, A; Stefan, N; Fritsche, A; Machicao, F; Häring, H-U; Balletshofer, B (Hormone and Metabolic Research, 2008)