Clinical Drug Investigation

, Volume 38, Issue 5, pp 479–479 | Cite as

Retraction Note to: Efficacy of Menatetrenone (Vitamin K2) against Non-Vertebral and Hip Fractures in Patients with Neurological Diseases

Meta-Analysis of Three Randomized, Controlled Trials
  • Jun Iwamoto
  • Hideo Matsumoto
  • Tsuyoshi Takeda
Retraction Note

1 Retraction to: Clin Drug Investig 2009; 29(7):471–479

The Editor-in-Chief has retracted this article because two of the three studies [1, 2] included in the meta-analysis (cited as references 11 and 12) have been retracted due to fabrication of the data, which has rendered the results of this meta-analysis invalid.

All authors agreed to this retraction.


  1. 1.
    Sato Y, Kanoko T, Satoh K, et al. Menatetrenone and vitamin D2 with calcium supplements prevent nonvertebral fracture in elderly women with Alzheimer’s disease. Bone. 2005;36:61–8. Scholar
  2. 2.
    Sato Y, Honda Y, Kaji M, et al. Amelioration of osteoporosis by menatetrenone in elderly female Parkinson’s disease patients with vitamin D deficiency. Bone. 2002;31:114–8. Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute for Integrated Sports MedicineKeio University School of MedicineTokyoJapan

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