1. A new assay for factor IX (PTC) is described.

2. With the use of this assay, 11 of 14 obligatory carriers of factor IX deficiency were found to have subnormal factor IX activity.

3. One of these carriers has a mild hemorrhagic history.

This content is only available as a PDF.
© 1962 by American Society of Hematology, Inc.
1962
Sign in via your Institution