Tolerance of thymic cytotoxic T lymphocytes to allogeneic H-2 determinants encountered prethymically: evidence for expression of anti-H-2 receptors prior to entry into the thymus

Tolerance of thymic cytotoxic T lymphocytes to allogeneic H-2 determinants encountered prethymically: evidence for expression of anti-H-2 receptors prior to entry into the thymus