1. Department of Bioresource Engineering, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
2. Department of Nursing, Faculty of Nursing and Welfare, Kyushu University of Nursing and Social Welfare, 888 Tomio, Tamana 865-0062, Japan
3. Department of Bioproduction, Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan