1 Nai-Wei Chen, Ph.D.: Department of Family & Community Medicine, Biostatistics Unit, MA306N Medical Sciences Building, DC032.00 Columbia, MO 65212. naiwei.chen@health.missouri.edu;. Tel.: +573 884-7232.
2 Thomas K. Nishino, Ph.D.,: Department of Imaging Physics, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA. Tel.: +(713) -792-2745. tnishino@mdanderson.org
3 Karl E. Anderson, M.D.: Department of Internal Medicine, John Sealy School of Medicine and Department of Population Health and Heath Disparities, School of Public and Population Health, The University of Texas Medical Branch, Galveston, TX 77555-0655, USA. kanderso@utmb.edu;. Tel.: +409 772 4661; fax: +409 772 6287.