Acknowledegments
We are grateful to Dr Pierluigi Porcu (The Ohio State University, Columbus, OH) for kindly providing expert consultation for the diagnosis and treatment of this case and English language editing of the manuscript. We would like to sincerely thank Dr Brian Eyden (Manchester, UK) for final English language editing. This project was supported by a grant (81370631) from the National Natural Science Foundation of China (S.Y.).
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article at http://dx.doi.org/10.3109/10428194.2015.1055484.