1. Center for Animal Transgenesis and Germ Cell ResearchDepartment of Clinical SciencesNew Bolton CenterSchool of Veterinary MedicineUniversity of PennsylvaniaKennett SquarePennsylvaniaUSA
2. GTC BiotherapeuticsFraminghamMassachusettsUSA
3. Tufts Cummings School of Veterinary MedicineNorth GraftonMassachusettsUSA
4. Department of Animal BiologySchool of Veterinary MedicineUniversity of PennsylvaniaKennett SquarePennsylvaniaUSA