RAPID COMMUNICATION

Overestimation of serum levels of rheumatoid factor caused by the presence of an incorrect calibrator in the Dade Behring kit

Authors

Nobuhide Hayashi¹, Seiji Kawano¹, Daisuke Sugiyama², Kunihiro Nishimura², Takashi Nakazawa³, Akio Morinobu² and Shunichi Kumagai³

1. Department of Clinical Laboratory, Kobe University Hospital, Kobe, Japan
2. Department of Evidence-based Laboratory Medicine (Sysmex), Kobe University Graduate School of Medicine, Kobe, Japan
3. Division of Clinical Pathology and Immunology, Department of Biomedical Informatics, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan

Received:

05 March 2007

Accepted:

12 June 2007

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Abstract

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Key words

Misdiagnosis - Reference material - Rheumatoid arthritis - Rheumatoid factor