Table 1.

Characteristics of the study population.

Subject	Age (years)	Sex	Ethnicity	Illness day	IVIG treatment response	CA status	rs28493229 genotype
1	0.67	M	Hispanic	4	Responder	Dilated	GG
2	2	F	Filipino	8	Responder	Normal	GG
3	4.3	M	Caucasian	6	Responder	Normal	GG
4	4.9	M	Filipino/Japanese	25	Late treatment	Dilated	GG
5	2.5	M	Hispanic/Filipino/Caucasian	5	Resistant	Dilated	GG
6	2.1	M	Hispanic	4	Responder	Normal	GC

Illness Day 1 was considered to be the first day of fever. Resistance to IVIG was define as persistent of recrudescent fever at least 36 hours after the completion of the initial IVIG infusion. Coronary artery status was determined by transthoracic echocardiography. Patients were considered to have dilated coronary arteries if the CA Z score for either the right or left anterior descending coronary arteries was ≥ 2.0 and returned to normal dimensions within 2 months after illness onset.