Why do most refer to the test for fetal rbcs in the maternal circulation as the k-b test instead of the k-b-b test. What happened to braun?

K-B. I don't know what happened to braun. I have always known the test as a kleinhauer-betke test. It may be a regional difference in names.
Who knows. And why lose the middle name? It used to be kleihauer-braun-betke and was shortened to kleihauer-betke. We got lazier?