Sex ratio and cleft lip with or without cleft palate.

@article{Niswander1972SexRA,
  title={Sex ratio and cleft lip with or without cleft palate.},
  author={Jerry D Niswander and C J Maclean and Chi Shing Chung and Krishna R. Dronamraju},
  journal={Lancet},
  year={1972},
  volume={2 7782},
  pages={858-60}
}