Informed conditioning on clinical covariates increases power in case-control association studies by Zaitlen, N, Lindström, S, Pasaniuc, B, Cornelis, M, Genovese, G, Pollack, S, Barton, A, Bickeböller, H, Bowden, D, Eyre, S, Freedman, B, Friedman, D, Field, J, Groop, L, Haugen, A, Heinrich, J, Henderson, B, Hicks, P, Hocking, L, Kolonel, L, Landi, M, Langefeld, C, Le Marchand, L, Meister, M, Morgan, A, Raji, O, Risch, A, Rosenberger, A, Scherf, D, Steer, S, Walshaw, M, Waters, K, Wilson, A, Wordsworth, B, Zienolddiny, S, Tchetgen, E, Haiman, C, Hunter, D, Plenge, R, Worthington, J, Christiani, D, Schaumberg, D, Chasman, D, Altshuler, D, Voight, B, Kraft, P, Patterson, N, Price, A