1. Department of Surgery-Transplant & Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, USA
2. Chongqing Academy of Animal Sciences & Key Laboratory of Pig Industry Sciences, Ministry of Agriculture, Chongqing, China
3. Department of Biochemistry & Biophysics & Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA
4. Department of Orthopedic Surgery, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV 25755, USA
5. Department of Surgery-General Surgery, University of Nebraska Medical Center, Omaha, NE 68198, USA
6. Department of Surgery-Plastic Surgery, University of Nebraska Medical Center, Omaha, NE 68198, USA