Abstract
[Neurol Med Chir (Tokyo) 53, 259-262, 2013]
Reference 20 on page 262
To the Readership: Reference 20 was incorrectly reported in the Reference section of the above-mentioned article.
Incorrect: 20) Wada M, Harada N, Higuchi K, Misawa N, Nakatsubo N, Tsukamoto K, Hashimoto S: Journal of Health and Welfare Statistics 55: 137-141, 2008 (Japanese)
Correct: 20) Health and Welfare Statistics Association: Journal of Health and Welfare Statistics 55: 137-141, 2008 (Japanese)