1. Division of Respirology, Rheumatology, Infectious Diseases and Neurology, Department of Internal Medicine, University of Miyazaki, Kihara 5200, Kiyotake, Miyazaki 889-1692, Japan
2. Department of Clinical Laboratory, University of Miyazaki Hospital, Kihara 5200, Kiyotake, Miyazaki 889-1692, Japan
3. Institute of Rheumatology, Miyazaki Zenjinkai Hospital, Miyazaki 880-0834, Japan