I don't think they were specifically looking for O-bands when they did my CSF testing (also back in the dark ages), but the test was botched, so they never found out anyway.
They never asked after that.
Cherie
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I am not a Neurologist, Physician, Nurse, or Hairdresser ... but I have learned that it is not such a great idea to give oneself a haircut after three margaritas
.