1. Department of Legal Medicine, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima 960-1295, Japan
2. Department of Biochemistry, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima 960-1295, Japan
3. Miyagi Prefecture Fisheries Research Development Center, Watanoha, Ishinomaki, Miyagi, 986-2135, Japan