Affiliation: | (1) The University of Calgary, USA;(2) Brown University, USA;(3) The Pennsylvania State University, USA;(4) University of British Columbia, USA;(5) Oregon State University, USA;(6) Western Washington State College, USA;(7) San Francisco State College, USA;(8) California State College, Hayward;(9) Colorado State University, USA;(10) University of Maryland, USA;(11) Eastern Washington State College, USA;(12) University of Nevada, Las Vegas;(13) The University of Tulsa, USA |