[1] Texas A&M Univ, Dept Biomed Engn, College Stn, TX 77843 USA
[2] Texas A&M Univ, Dept Biol, College Stn, TX 77843 USA
[3] Texas A&M Univ, Dept Vet Pathobiol, College Stn, TX 77843 USA
[4] Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA