- T lymphocytes with a normal ADA gene accumulate after transplantation of transduced autologous umbilical cord blood CD34+ cells in ADA-deficient SCID neonates. Kohn, D.B., Hershfield, M.S., Carbonaro, D., Shigeoka, A., Brooks, J., Smogorzewska, E.M., Barsky, L.W., Chan, R., Burotto, F., Annett, G., Nolta, J.A., Crooks, G., Kapoor, N., Elder, M., Wara, D., Bowen, T., Madsen, E., Snyder, F.F., Bastian, J., Muul, L., Blaese, R.M., Weinberg, K., Parkman, R. Nat. Med. (1998)