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Retraction: Effects of alendronate and alfacalcidol on the femoral bone mass and bone strength in orchidectomized rats

The paper by Iwamoto J et al. “Effects of alendronate and alfacalcidol on the femoral bone mass and bone strength in orchidectomized rats” in CJP, 2008, 51(6), pp. 331-337, also receives several concerns about authorship, partial duplication and discrepancies in animal drug doses and preparation.[1] Co-author Yoshihiro Sato states that he should not have been listed as an author. In Iwamoto J. et al. in 2008,[1] column 2 (Initial body weight) and column 3 (Final body weight) of Table 1 are identical to the publication by the same group of authors in J Nutr Sci Vitaminol.[2] These two publications used the same experimental intervention on an identical group of 50 rats. Discrepancies: A. The paper in CJP states ALF was administrated at 0.1 μg/kg, whereas the paper in J Nutr Sci Vitaminol states ALF was administrated at 0.05 μg/kg.[1,2] Both statements cannot be true. B. The paper in J Nutr Sci Vitaminol[2] states that all animals were labeled with 10 mg/kg calcein by intramuscular injection 10 and 3 days before sacrifice, which was not mentioned in the paper in CJP.[1]