1. Yoffey, J. M., Ann. Rev. Med., 15, 125 (1964).
2. Gillman, J., Gillman, T., and Gilbert, C., Clin. Proc., 8, 222 (1949).
3. Sieracki, J. C., and Rebuck, J. W., in The Lymphocyte and Lymphocytic Tissue, edit. by Rebuck, J. W., 82 (P. B. Hoeber, Inc., 1960).
4. Allgower, M., The Cellular Basis of Wound Healing (Charles C. Thomas, Springfield, Illinois, 1956).
5. Hulliger, L., and Allgower, M., Experientia, 19, 1 (1963).