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21,321 items of data are available, covering 21,321 participants, encoded using Data-Coding 1021
Question asked: Do you or did you develop any of the following warning symptoms before or near the onset of your headache? My visual changes develop slowly over several minutes or more.
Only asked if Field 120065 was answered yes
0 Related Data-FieldsThere are no related data-fields
There are no tabulations involving field 120066.
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