1. Western Michigan University Homer Stryker M.D., School of Medicine, Kalamazoo, MI, USA; Missouri School of Dentistry and Oral Health, A.T. Still University, Kirksville, MO, USA
2. Department of Research Support, A.T. Still University, Kirksville, MO, USA
3. Missouri School of Dentistry and Oral Health, A.T. Still University, Kirksville, MO, USA