1. Department of Orthopedics and Rheumatology and
2. Department of Orthopedics, NHO Miyakonojo Hospital, Miyakonojo, Miyazaki, Japan,
3. Division of Orthopaedic Surgery, Department of Medicine of Sensory and Motor Organs, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan, and
4. Department of Rheumatology, NHO Sagamihara Hospital, Kanagawa, Japan