Assertion: food allergy | /r/HasProperty | diagnosed in infant
Facets:
value: rarely
type: DEGREE
value: by using a food challenge
type: MANNER
value: by observing the effect
type: MANNER
value: usually
type: TEMPORAL
Source sentences:
text: In infants, food allergy is usually diagnosed by observing the effect of changing the infant's diet; rarely, by using a food challenge.