1. Stem Cell and Tissue Engineering Laboratory, Department of OrthopaedicsWest Virginia UniversityMorgantown West Virginia 26506
2. Department of Sports Medicine and Adult Reconstructive Surgery, Drum Tower Hospital, School of MedicineNanjing University321 Zhongshan Road Nanjing 210008 Jiangsu China
3. State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Disease Hospital Huyuan DivisionTianjin 300020 China
4. Department of MedicineLoma Linda UniversityLoma Linda California 92350
5. Robert C. Byrd Health Sciences Center, WVU Cancer InstituteWest Virginia UniversityMorgantown West Virginia 26506