Assertion: cerebral hemorrhage's symptom | /r/HasProperty | dissimilar
Facets:
value: to previous headaches
type: OTHER
Source sentences:
text: The classic initial symptom with aSAH is a severe thunderclap headache that is maximal at onset and dissimilar to previous headaches but can be preceded by a warning “sentinel headache” in up to 40% of individuals with aSAH.6 Associated factors