Reference:
Boelaert K, Newby P, Simmonds M, Holder R, Carr-Smith J, Heward J, Manji N, Allahabadia A, Armitage M, Chatterjee K, Lazarus J, Pearce S, Vaidya B, Gough S, Franklyn J. Prevalence and relative risk of other autoimmune diseases in subjects with autoimmune thyroid disease. American Journal of Medicine 2010;123(2): 183.e1-9.