1Department of Mathematics, Vanderbilt University, Nashville, TN, USA
2Research Department, ArthroChip, LLC, Franklin, TN, USA
3Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
4Department of Medicine, Penn State Hershey Medical Center, Hershey, PA, USA
5Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, TN, USA