**6. Conclusions**

The thickness of the PF at the insertion and the CPF is reduced in patients with AT measured by USI. The present study did not intend to provide an explanation of the cause or management of AT. Consequently, USI abnormalities in the PF complex should be interpreted within the clinical context in patients with AT.

**Author Contributions:** All authors: concept, design, analyses, interpretation of data, drafting of manuscript or revising it critically for important intellectual content.

**Acknowledgments:** We would like to thank the persons that participated in this research.

**Conflicts of Interest:** The authors declare no conflict of interest.
