Polymorphic variation in the 11beta-hydroxylase gene associates with reduced 11-hydroxylase efficiency. - Barr, M; MacKenzie, S; Friel, E; Holloway, C; Wilkinson, D; Brain, N; Ingram, M; Fraser, R; Brown, M; Samani, N; Caulfield, M; Munroe, P; et al. (Hypertension, 2007)