1. Baxter Laboratory for Stem Cell BiologyInstitute for Regenerative Medicine and Stem Cell BiologyDepartment of Microbiology and ImmunologyStanford UniversityStanfordCaliforniaUSA
2. Department of BiomedicineBasel University HospitalBaselSwitzerland
3. Department of SurgeryBasel University HospitalBaselSwitzerland
4. Cardiovascular Research InstituteUniversity of California at San FranciscoSan FranciscoCaliforniaUSA
5. Comprehensive Cancer CenterUniversity of California at San FranciscoSan FranciscoCaliforniaUSA
6. Department of AnatomyUniversity of California at San FranciscoSan FranciscoCaliforniaUSA