Zhaofei Fan
School of Forestry and Wildlife Sciences, Auburn University, 602 Duncan Drive, Auburn, AL 36849

W. Keith Moser
USDA Forest Service, Rocky Mountain Research Station, Flagstaff, AZ 86001

Michael K. Crosby
School of Agricultural Sciences and Forestry, Louisiana Tech University, Ruston, LA 71272

Weiming Yu
Department of Forestry, Mississippi State University, Mississippi State, MS 39762

Yaoqi Zhang
School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849

Mark H. Hansen
USDA Forest Service, Northern Research Station, St. Paul, MN 55180

Shirley X. Fan
Statistical Consulting Center, Department of Mathematics and Statistics, Auburn University, Auburn, AL 36849