1. Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio.
2. Department of Case Center for Multimodal Evaluation of Engineered Cartilage, Case Western Reserve University, Cleveland, Ohio.
3. Department of Biology, Case Western Reserve University, Cleveland, Ohio.
4. Department of Orthopedic Surgery, Baylor College of Medicine, Houston, Texas.
5. Department of Civil Engineering, Case Western Reserve University, Cleveland, Ohio.