Response to: ‘Diabetes mellitus in ankylosing spondylitis’ by Lee and Song

We would like to thank Dr Lee and Dr Song for their correspondence to our preliminary study recently published in Annals of the Rheumatic Diseases .1 2 Dr Lee and Dr Song have raised some concerns. We make a response as follows. First, the non-ankylosing spondylitis group included persons without a diagnosis code of ankylosing spondylitis (based on International …