CTLA4 and Vogt-Koyanagi-Harada disease: A study of Chinese Han patients with VKH disease provided evidence that the G allele at SNP +49 of CTLA-4 was associated with VKH disease, and the CTLA-4 haplotype −1661A:−318C:+49G:CT60G was also found to confer risk of VKH disease [[53]].