The codon 620 tryptophan allele of the lymphoid tyrosine phosphatase (LYP) gene is a major determinant of Graves’ disease - Velaga, M R; Wilson, V; Jennings, C E; Owen, C J; Herington, S; Donaldson, P T; Ball, S G; James, R A; Quinton, R; Perros, P; Pearce, S H (J Clin Endocr Metab, 2004)