1. Functional assessment in ankylosing spondylitis: Evaluation of a new self-administered questionnaire and correlation with anthropometric variables;Abbott;Br J Rheumatol,1994
2. Problem elicitation to assess patient priorities in ankylosing spondylitis and fibromyalgia;Bakker;J Rheumatol,1995
3. Measures to assess ankylosing spondylitis: Taxonomy, review and recommendations;Bakker;J Rheumatol,1993
4. Cost effectiveness of group physical therapy compared to individualized therapy for ankylosing spondylitis. A randomized controlled trial;Bakker;J Rheumatol,1994
5. Patient utilities in ankylosing spondylitis and the association with other outcome measures;Bakker;J Rheumatol,1994