1. Department of Applied Mathematics, Feng Chia University, 100 Wen-Hwa Road, Taichung, Taiwan
40724
2. Department of Mathematics, Taida Institute for Mathematical
Sciences (TIMS), No. 1, Sec. 4, National Taiwan University, Roosevelt Road, Taipei 106, Taiwan
3. Department of Mathematics, Pennsylvania State University University Park, Pennsylvania 16802,
United States
4. Department of Molecular Biophysics and Physiology, Rush University, 1653 West Congress Parkway, Chicago,
Illinois 60612, United States