H. Chung, P. Machado, D. Van-der-heijde, D. Agostino, M. Dougados et al., HLA-B27 positive patients differ from HLA-B27 negative patients in clinical presentation and imaging: results from the DESIR cohort of patients with recent onset axial spondyloarthritis, Annals of the Rheumatic Diseases, vol.70, issue.11, pp.1930-1936, 2011.
DOI : 10.1136/ard.2011.152975
URL : https://hal.archives-ouvertes.fr/hal-00930271

V. Gerdan, S. Akar, D. Solmaz, Y. Pehlivan, A. Onat et al., Initial Diagnosis of Lumbar Disc Herniation Is Associated with a Delay in Diagnosis of Ankylosing Spondylitis, The Journal of Rheumatology, vol.39, issue.10, pp.1996-2005, 2012.
DOI : 10.3899/jrheum.120106

R. Aggarwal and A. Malaviya, Diagnosis delay in patients with ankylosing spondylitis: factors and outcomes???an Indian perspective, Clinical Rheumatology, vol.54, issue.2, pp.327-358, 2009.
DOI : 10.1136/ard.61.suppl_3.iii3

E. Feldtkeller, J. Bruckel, and M. Khan, Scientific contributions of ankylosing spondylitis patient advocacy groups, Current Opinion in Rheumatology, vol.12, issue.4, pp.239-286, 2000.
DOI : 10.1097/00002281-200007000-00002

E. Feldtkeller and J. Erlendsson, Definition of disease duration in ankylosing spondylitis, Rheumatology International, vol.60, issue.7
DOI : 10.1007/s00296-007-0499-y

J. Sørensen and M. Hetland, Diagnostic delay in patients with rheumatoid arthritis, psoriatic arthritis and ankylosing spondylitis: results from the Danish nationwide DANBIO registry, Annals of the Rheumatic Diseases, vol.8, issue.(Suppl 51), p.12, 2015.
DOI : 10.1186/1472-6963-8-49

M. Seo, H. Baek, H. Yoon, H. Ryu, H. Choi et al., Delayed diagnosis is linked to worse outcomes and unfavourable treatment responses in patients with axial spondyloarthritis, Clinical Rheumatology, vol.31, issue.8, pp.1397-405, 2015.
DOI : 10.1136/annrheumdis-2012-202073

J. Smolen, F. Breedveld, G. Burmester, V. Bykerk, M. Dougados et al., Treating rheumatoid arthritis to target: 2014 update of the recommendations of an international task force, Annals of the Rheumatic Diseases, vol.54, issue.(4 Suppl 78), pp.3-15, 2016.
DOI : 10.1093/rheumatology/keu156

J. Smolen, J. Braun, M. Dougados, P. Emery, O. Fitzgerald et al., Treating spondyloarthritis, including ankylosing spondylitis and psoriatic arthritis, to target: recommendations of an international task force, Annals of the Rheumatic Diseases, vol.66, issue.suppl 2, pp.6-16, 2014.
DOI : 10.1136/ard.2007.071092

J. Sieper and M. Rudwaleit, Early referral recommendations for ankylosing spondylitis (including pre-radiographic and radiographic forms) in primary care, Annals of the Rheumatic Diseases, vol.64, issue.5, pp.659-63, 2005.
DOI : 10.1136/ard.2004.028753
URL : http://ard.bmj.com/content/annrheumdis/64/5/659.full.pdf

H. Brandt, I. Spiller, I. Song, J. Vahldiek, M. Rudwaleit et al., Performance of referral recommendations in patients with chronic back pain and suspected axial spondyloarthritis, Annals of the Rheumatic Diseases, vol.66, issue.11, pp.1479-84, 2007.
DOI : 10.1136/ard.2006.068734

P. Robinson and M. Brown, The window of opportunity: a relevant concept for axial, Rev Rhum Mal Osteoartic, vol.57, issue.2, pp.85-94, 1990.

D. Jadon, A. Ramanan, and R. Sengupta, Juvenile Versus Adult-onset Ankylosing Spondylitis -- Clinical, Radiographic, and Social Outcomes. A Systematic Review, The Journal of Rheumatology, vol.40, issue.11, pp.1797-805, 2013.
DOI : 10.3899/jrheum.130542

M. Guan, J. Wang, Z. Zhu, X. J. Zhao, L. Li et al., Comparison in clinical features and life impact between juvenile-onset and adult-onset ankylosing spondylitis, TURKISH JOURNAL OF MEDICAL SCIENCES, vol.44, issue.4, pp.601-606, 2014.
DOI : 10.3906/sag-1306-64

L. Eder, J. Jayakar, A. Thavaneswaran, A. Haddad, V. Chandran et al., Is the
URL : https://hal.archives-ouvertes.fr/hal-00964568

D. Poddubnyy, A. Van-tubergen, R. Landewé, J. Sieper, and D. Van-der-heijde, Development of an ASAS-endorsed recommendation for the early referral of patients with a suspicion of axial spondyloarthritis, Annals of the Rheumatic Diseases, vol.72, issue.(Suppl 3)
DOI : 10.1136/annrheumdis-2012-201884

L. Van-hoeven, J. Luime, H. Han, Y. Vergouwe, and A. Weel, Identifying Axial Spondyloarthritis in Dutch Primary Care Patients, Ages 20-45 Years, With Chronic Low Back Pain, Arthritis Care & Research, vol.72, issue.2, pp.446-53, 2014.
DOI : 10.1136/annrheumdis-2012-201766

E. Villeneuve, J. Nam, M. Bell, C. Deighton, D. Felson et al., Republished: A systematic literature review of strategies promoting early referral and reducing delays in the diagnosis and management of inflammatory arthritis, Postgraduate Medical Journal, vol.89, issue.1050, pp.231-271, 1050.
DOI : 10.1136/postgradmedj-2011-201063rep

B. Combe, R. Landewe, C. Lukas, H. Bolosiu, F. Breedveld et al., EULAR recommendations for the management of early arthritis: report of a task force of the European Standing Committee for International Clinical Studies Including Therapeutics (ESCISIT), Annals of the Rheumatic Diseases, vol.66, issue.1, pp.34-45, 2007.
DOI : 10.1136/ard.2005.044354

S. Muñoz-fernández, L. Carmona, E. Collantes, J. Mulero, M. García-yébenes et al., A model for the development and implementation of a national plan for the optimal management of early spondyloarthritis: the Esperanza Program, Annals of the Rheumatic Diseases, vol.70, issue.5, pp.827-857, 2011.
DOI : 10.1136/ard.2010.141200

M. Rudwaleit and J. Sieper, Referral strategies for early diagnosis of axial spondyloarthritis, Nature Reviews Rheumatology, vol.68, issue.5
DOI : 10.1016/j.berh.2010.01.005

J. Sieper, How to screen for axial spondyloarthritis in primary care?, Current Opinion in Rheumatology, vol.24, issue.4, pp.359-62, 2012.
DOI : 10.1097/BOR.0b013e328352e0ee

B. Fautrel, M. Benhamou, V. Foltz, N. Rincheval, A. Rat et al., Early referral to the rheumatologist for early arthritis patients: evidence for suboptimal care. Results from the ESPOIR cohort, Rheumatology, vol.49, issue.1, pp.147-55, 2010.
DOI : 10.1093/rheumatology/kep340
URL : https://hal.archives-ouvertes.fr/hal-00790224