Can you please let me know if this understanding is correct? In the case of seizures, if a subject with a pre-existing seizure disorder goes on to have a seizure (after enrollment/baseline) in a trial, assuming the event is no worse than what the volunteer had experienced before in severity, frequency or character, then this event would not be reported as an adverse event, but would be documented in the clinical chart and attributed to their medical history (in the CRFs).