CRP and ankylosing spondylitis: At the end of the treatment, the primary outcome is Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) with a range of 0 to 10,and the secondary outcomes will include functional ability that measured by Bath Ankylosing Spondylitis Functional Index (BASFI), mobility measured by Bath Ankylosing Spondylitis Metrology Index (BASMI), chest expansion, night spinal pain, adverse reactions, laboratory measures such as erythrocyte sedimentation rate (ESR) and C protein response (CRP).