4. Porcine Cells   1. Porcine Coronary Artery Endothelial Cells (PCAEC) 2. Porcine Pulmonary Artery Endothelial Cells (PPAEC) 3. Porcine Aortic Endothelial Cells (PAOEC) 4. Porcine Coronary Artery Smooth Muscle Cells (PCASMC) 5. Porcine Pulmonary Artery Smooth Muscle Cells (PPASMC) 6. Porcine Aortic Smooth Muscle Cells (PAOSMC)