Affiliation: | 1.Division of Environmental Engineering, Faculty of Engineering,Hokkaido University,Sapporo,Japan;2.Amway,Ada,USA;3.Physician Assistant Program,Midwestern University,Glendale,USA;4.Environmental Health Division,Coconino County Health Department,Flagstaff,USA;5.Department of Soil, Water and Environmental Science,The University of Arizona,Tucson,USA |