1. Department of Management Sciences, City University of Hong Kong, Kowloon, Hong Kong E‐mail: msawan@cityu.edu.hk
2. Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China, and Department of Biostatistics and Computational Biology, University of Rochester, NY 14642, USA E‐mail: Guohua_Zou@URMC.Rochester.edu
3. Department of Mathematical Sciences, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931–1295, USA E‐mail: hqin@mtu.edu