Accepted for Publication: June 17, 2013.
Published Online: September 23, 2013. doi:10.1001/jamaneurol.2013.3918.
Study concept and design: R. Yang, Wang, Lehmann-Horn.
Acquisition of data: R. Yang, Cao, Seelig, C. Yang, Liu, Pan, Zheng, Lehmann-Horn.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Cao, Wang.
Critical revision of the manuscript for important intellectual content: R. Yang, Jurkat-Rott, Wang, Seelig, C. Yang, Liu, Pan, Zheng, Lehmann-Horn.
Statistical analysis: R. Yang, Cao, C. Yang, Liu, Pan, Zheng.
Obtained funding: Lehmann-Horn.
Administrative, technical, or material support: R. Yang, Jurkat-Rott, Seelig.
Study supervision: R. Yang, Jurkat-Rott, Lehmann-Horn.
Conflict of Interest Disclosures: None reported.
Funding/Support: Drs Lehmann-Horn and Jurkat-Rott received grants from the nonprofit Else Kröner-Fresenius-Stiftung and the Federal Ministry of Education and Research (BMBF) for the IonNeurONet rare diseases project. Dr Lehmann-Horn is an endowed Senior Research Professor of Neuroscience of the nonprofit Hertie Foundation.
Role of the Sponsor: The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Information: Correspondence on thymus surgery and reprint requests to Renrong Yang, MD, Department of Thoracic Surgery, 117 PLA Hospital, Hangzhou 310004, China (email@example.com), and correspondence on thymus pathology to Guofeng Wang, MD, Department of Pathology, Second Affiliated Hospital of Zhejiang, University School of Medicine, Hangzhou 310004, China (firstname.lastname@example.org).
Additional Contributions: Drs Lehmann-Horn and Jurkat-Rott thank Pavel Biletskiy, MD, and Henning Andersen, MD, for providing medical reports on 2 additional patients with hypokalemic PP and an enlarged thymus. We thank Brian Eyden, MD (Manchester, England), for improvements to the manuscript.