Direct Intramyocardial Mesenchymal Stromal Cell Injections in Patients with Severe Refractory Angina: One-Year Follow-Up oleh Mandana Haack-Sørensen, Tina Friis, Anders B. Mathiasen, Erik Jørgensen, Louise Hansen, Ebbe Dickmeiss, Annette Ekblond, Jens Kastrup M.D., D.MSc., FESC