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2. Heritability estimates on ankylosing spondylitis;Pedersen;Clin Exp Rheumatol,2006
3. Identification of major loci controlling clinical manifestations of ankylosing spondylitis;Brown;Arthritis Rheum,2003
4. Is disease severity in ankylosing spondylitis genetically determined?;Hamersma;Arthritis Rheum,2001
5. Concordance of disease severity among family members with ankylosing spondylitis?;Brophy;J Rheumatol,2004