Zhao Y, Gopalai AA, Ahmad-Annuar A, Teng EW, Prakash KM, Tan LC, Au WL, Li HH, Lim SY, Lim SK, Chong YB, Tan LP, Ibrahim NM, Tan EK. Association of HLA locus variant in Parkinson's disease. Clin Genet. 2013 Nov;84(5):501–4. doi: 10.1111/cge.12024. PMID: 23083294.