Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Figure 3 Flow diagram of classification of patients included in the early spondyloarthritis (SpA) clinic cohort according to a modification of the Berlin algorithm. The order of human leucocyte antigen B27 (HLA‐B27) testing and magnetic resonance imaging (MRI) of the sacroiliac joints is changed. AS, ankylosing spondylitis.
