1. Department of Epidemiology and Biostatistics; School of Public Health; Indiana University Bloomington; Bloomington Indiana United States of America
2. Department of Mathematics and Statistics; University of New Mexico; Albuquerque New Mexico United States of America
3. The Key Laboratory of Machine Perception (Ministry of Education); School of EECS; Peking University; Beijing China
4. Department of Computer Science; Sam Houston State University; Huntsville Texas United States of America
5. Department of Biostatistics; College of Public Health; University of Iowa; Iowa City Iowa United States of America