1. Center for Rheumatology and Collagen Diseases, Fukushima Red Cross Hospital, Fukushima, Japan
2. Department of Pediatrics, Fukushima Medical University School of Medicine, Fukushima, Japan
3. Department of Gastroenterology, Fukushima Red Cross Hospital, Fukushima, Japan
4. Department of Pathology, Fukushima Red Cross Hospital, Fukushima, Japan
5. Department of Rheumatology and Collagen Diseases, Fukushima Medical University School of Medicine, Fukushima, Japan
6. Department of Gastroenterology, Fukushima Medical University School of Medicine, Fukushima, Japan.