Situs inversus--an incident finding.

@article{To2001SitusII,
  title={Situs inversus--an incident finding.},
  author={Edward Wai-Hei To and Wai Ming Tsang and Kwan Ho Lee},
  journal={Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics},
  year={2001},
  volume={92 5},
  pages={483-4}
}