1Denver Health Medical Center, Department of Surgery, Denver, Colorado, USA
2University of Colorado, Department of Surgery, Aurora, Colorado, USA
3Bonfils Blood Center, Denver, Colorado, USA
*Corresponding Author:
Carlton C Barnett Jr, MD, Denver Health Medical Center, Department of Surgery, Denver, Colorado, USA, Tel: 303-436-5402, Fax: 303-436- 6572 Email: