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Cyclosporin administration improves clinical manifestations and quality of life in patients with 20-nail dystrophy: Case series and survey study


  • Conflicts of interest: none.
  • Author contributions: Y. B. L., H. J. P. and B. K. C. had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Y. B. L., B. K. C. and H. J. P. Acquisition of data: M. S. C. and Y. S. E. Analysis and interpretation of data: Y. B. L., Y. G. P. and H. J. P. Drafting of the manuscript: Y. B. L., B. K. C. and H. J. P. Critical revision of the manuscript for important intellectual content: Y. B. L., B. K. C. and H. J. P. Statistical analysis: H. J. P. Obtaining funding: H. J. P. Administrative, technical or material support: Y. B. L., H. J. P. Study supervision: Y. B. L., H. J. P., B. K. C.

Correspondence: Hyun Jeong Park, M.D., Department of Dermatology, Yeouido St Mary's Hospital, College of Medicine, The Catholic University of Korea, 62 Yeouido-dong, Youngdeungpo-ku, Seoul 150-713, Korea. Email:

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