Inclusion Criteria:
retrospective:12 months at least first anti-TNF therapy prospective: at maximum 6 months observation AS patients with axial involvment
Exclusion Criteria:
patients in other AS studies involved
Read more: http://www.clinicaltrials.gov/ct2/show/NCT01856569?cond=%22Arthritis%22&lup_s=01/29/2014&lup_d=30
