Genetic association analysis reveals differences in the contribution of NOD2 variants to the clinical phenotypes of orofacial granulomatosis by Mentzer, A, Nayee, S, Omar, Y, Hullah, E, Taylor, K, Goel, R, Bye, H, Shembesh, T, Elliott, T, Campbell, H, Patel, P, Nolan, A, Mansfield, J, Challacombe, S, Escudier, M, Mathew, C, Sanderson, J, Prescott, N