1. Kiltz U, van der Heijde D, Cieza A, Boonen A, et al. (2011). Developing and validating an index for measuring health in patients with ankylosing spondylitis. Rheumatology 50(5):894-8.
2. Kostanjsek N, Escorpizo R, Boonen A, Walsh NE, et al. (2011). Assessing the impact of musculoskeletal health conditions using the International Classification of Functioning, Disability and Health. Disability and Rehabilitation 33(13-14):1281-97.
3. Kiltz U, van der Heijde D, Cieza A, Boonen A, et al. (2011). Developing and validating an index for measuring health in patients with ankylosing spondylitis. Rheumatology 50(5):894-8.
4. Boonen A, Maksymowych WP. (2010). Measurement: function and mobility (focussing on the ICF framework). Best Practice and Research: Clinical Rheumatology 24(5):605-24.
5. Boonen A, Braun J, van der Horst Bruinsma IE, Huang F, et al. (2010). ASAS/WHO ICF Core Sets for ankylosing spondylitis (AS): how to classify the impact of AS on functioning and health. Annals of the Rheumatic Diseases 69(1):102-7.
6. Escorpizo R, Cieza A, Beaton D, Boonen A. (2009). Content comparison of worker productivity questionnaires in arthritis and musculoskeletal conditions using the International Classification of Functioning, Disability, and Health framework. Journal of Occupational Rehabilitation 19(4):382-97.
7. Boonen A, van Berkel M, Cieza A, Stucki G, et al. (2009). Which aspects of functioning are relevant for patients with ankylosing spondylitis: results of focus group interviews. Journal of Rheumatology 36(11):2501-11.
8. Boonen A, Stucki G, Maksymowych W, Rat AC, et al. (2009). The OMERACT-ICF Reference Group: integrating the ICF into the OMERACT process: opportunities and challenges. Journal of Rheumatology 36(9):2057-60.
9. Cieza A, Hilfiker R, Boonen A, Chatterji S, et al. (2009). Items from patient-oriented instruments can be integrated into interval scales to operationalize categories of the International Classification of Functioning, Disability and Health. Journal of Clinical Epidemiology 62(9):912.e1-912.e13.
10. Boonen A, Mau W. (2009). The economic burden of disease: Comparison between rheumatoid arthritis and ankylosing spondylitis. Clinical and Experimental Rheumatology 27(4 SUPPL. 55):S112-S117.