RT @knwachter: RT @mitchelzoler: New criteria to dx periph. dz of spondyloarthritis from ASAS; big change is role for HLA-B27 #EULAR09
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RT @knwachter: RT @mitchelzoler: New criteria to dx periph. dz of spondyloarthritis from ASAS; big change is role for HLA-B27 #EULAR09