title: Pitfalls in assessment of prognosis. Weak study designs are liable to bias.
authors.forename: S M
authors.initials: SM
authors.lastname: van der Linden
authors.forename: P
authors.initials: P
authors.lastname: Tugwell
mesh_terms: D001528:Behcet Syndrome / Q000453:epidemiology* / Q000276:immunology; D005069:Evaluation Studies as Topic; D015235:HLA-B Antigens / Q000032:analysis; D015796:HLA-B27 Antigen; D006801:Humans; D011379:Prognosis; D012107:Research Design / Q000592:standards*; D012219:Rheumatology / Q000379:methods*; D014421:Turkey
chemical_list: D015235:HLA-B Antigens; D015796:HLA-B27 Antigen; C035270:HLA-B5 antigen