Statistical measurements for the transplantable human fetal BM CD34⁺ thy-1⁺ cells before and after culture by a standard calibration method. (A) The measurements in the SCID-hu thy/liv model. (B) The measurements in the SCID-hu bone model. The statistical analyses are based on the data shown in Tables 1and 6. Ninety-five percent lower confidence bounds were found by applying a standard calibration method40 to the exact binomial lower confidence bound for the cultured cell engraftment probability, using a 97.5% confidence level for both SCID-hu mouse models.