Assertion: canker sore's cause | /r/Synonym | recurrent oral aphthous ulcers
Facets:
Source sentences:
text: The causes of recurrent cases of canker sore – known as recurrent oral aphthous ulcers or recurrent aphthous stomatitis – are also unclear, although there are links with a number of factors including a family history of aphthous ulcers, and allergies.