Table 1. Association between humidifier disinfectant exposure and health injury assessment questionnaire.

Questions		Contents
A		There was a disease/symptom related to the claimed disease prior to exposure.
	A1	Symptom/disease worsened while using humidifier disinfectant.
	A2	The causal relationship is medically explainable.
	A3	It is confirmed as an objective evidence.
	A4	The person's statement is consistent and reliable.
B		There was a disease/symptom related to the claimed disease during exposure.
	B1	Symptom/disease improved after the exposure was stopped.
	B2	The causal relationship is medically explainable.
	B3	It is confirmed as an objective evidence.
	B4	The person's statement is consistent and reliable.
C		The symptom/disease related to the claimed disease occurred or worsened after the exposure was stopped.
	C1	Incubation period of the claimed disease occurred after the exposure was stopped.
	C2	The causal relationship is medically explainable.
	C3	It is confirmed as an objective evidence.
	C4	The person's statement is consistent and reliable.