Hamilton R D, Crockett A J, Ruffin R E, Alpers J H
Aust N Z J Med. 1979 Aug;9(4):417-9. doi: 10.1111/j.1445-5994.1979.tb04170.x.
A patient with Western red cedar induced asthma is described. The diagnosis was confirmed by a bronchial challenge with Western red cedar saw dust and the subsequent prolonged bronchial reactivity changes were measured using histamine inhalation tests.