1. Department of Mathematics and Statistics, University of Nevada, Reno, NV, USA.
2. Biostatistics/Epidemiology/Research Design Core, Center for Clinical and Translational Sciences, The University of Texas Health Science Center, Houston, TX, USA.
3. School of Community Health Sciences, University of Nevada, Reno, NV, USA.
4. College of Mathematics and Statistics, Institute of Statistical Sciences, Shen Zhen-Hong Kong Joint Research Center for Applied Statistical Sciences, Shenzhen University, Shenzhen, China.
5. Department of Preventive Medicine, Sun Yat-sen University, Guangzhou, China.
6. Department of Mathematical Sciences, Michigan Technological University, Houghton, Michigan, USA.