Table 2.

Allergen used for each participant and the concentration at which they qualified during the screening visit

QAC Study				CAC Study
	Study ID	Allergen	Max. Allergen Conc.		Study ID	Allergen	Max. Allergen Conc.
Queen’s University	A046 109	Ragweed	1:128	Queen’s University	A083 117	Ragweed	1:8
	A017 110	Ragweed	1:128		A015 114	Ragweed	1:128
	A096 112	Ragweed	1:128		A053 118	Ragweed	1:32
	A050 113	Ragweed	1:128		A044 119	Ragweed	1:32
	A081 105	Ragweed	1:32		A079 116	Ragweed	1:8
	A033 104	Ragweed	1:512		A056 115	Ragweed	1:2
	A019 106	Ragweed	1:32		A016 125	Ragweed	1:32
	A001 108	Ragweed	1:2048		A060 124	Ragweed	1:128
	A066 103	Ragweed	1:128		A083 129	Ragweed	1:32
	A090 102	Ragweed	1:512		A048 131	Ragweed	1:32
Université Laval	A070 301	Std D. farinae	1:32		A002 123	Non-Allergic	1:2
	A095 302	Grass mix (5)	1:32		A061 126	Non-Allergic	1:2
	A008 303	Grass mix (5)	1:32		A088 127	Non-Allergic	1:2
	A038 304	D. pteronyssinus	1:32		A085 133	Non-Allergic	1:2
	A073 305	Std D. farinae	1:512
McMaster University	AR001	D. pteronyssinus	1:32
	AR002	Grass	1:2048
	AR003	Cat hair	1:32
University of Alberta	A275 404	Grass mix	1:2
	A749 405	D. farinae	1:32

Non-allergic participants in the CAC study did not meet the qualifying criteria even after challenge with the highest concentration (1:2). During the NAC visit, the 1:2 concentration was used once again.