Authors: Christensen, K Olsen, J Norgaard-Pedersen, B Basso, O Stovring, H Milhollin-Johnson, L Murray, JC

Citation: K. Christensen et al., Oral clefts, transforming growth factor alpha gene variants, and maternal smoking: A population-based case-control study in Denmark, 1991-1994, AM J EPIDEM, 149(3), 1999, pp. 248-255