Recurrent 17 bp duplication in PITX3 is primarily associated with posterior polar cataract (CPP4).

@article{Berry2004Recurrent1B,
  title={Recurrent 17 bp duplication in PITX3 is primarily associated with posterior polar cataract (CPP4).},
  author={V. Berry and Ze Yang and Peter K F Addison and Peter Francis and Alex Ionides and Goutam Karan and Li Jiang and Weitao Lin and J Hu and Rongzhi Yang and Anthony Moore and Kai-yue Zhang and Shomi Shanker Bhattacharya},
  journal={Journal of medical genetics},
  year={2004},
  volume={41 8},
  pages={e109}
}