[1] Univ Bradford, Dept Comp, Bradford BD7 1DP, W Yorkshire, England
[2] Purdue Univ, Sch Vet Med, W Lafayette, IN 47907 USA
[3] Purdue Univ, Weldon Sch Biomed Engn, W Lafayette, IN 47907 USA
[4] Deakin Univ, Sch Informat Technol, Melbourne, Vic, Australia