1. Ackermann, J. R., Hopkinson, W. I., Murphy, D. M. G., and Kenyon, J. R., Proc. First Intern. Cong. Transpl. Soc. (Munksgaard, 1967).
2. Ladaga, L. G., Nabseth, D. C., Beznyak, I., Hendry, W. F., McLeod, G., and Deterling, R. A., Ann. Surg., 163, 553 (1966).
3. Lampert, N., Blumenstock, D. A., and Carter, R. D., Surgical Forum, 16, 196 (1965).
4. Almond, C. H., Anido, H., Seabe, R. A., Young, R., and McKenzie, W., Dis. Chest, 49, 41 (1966).
5. Bloch, J. H., Manax, W. G., and Lillehei, R. C., J. Thorac. Cardiov. Surg., 48, 969 (1964).