00503nas a2200193   4500000000100000000000100001008004100002100001600043700001400059700002000073700001400093700001600107700001600123700001600139245012200155300001100277490000700288022001400295       2015                            d1 aC. Stolwijk1 aI. Essers1 aA. van Tubergen1 aA. Boonen1 aM. Bazelier1 aM. De Bruin1 aF. de Vries00aThe epidemiology of extra-articular manifestations in ankylosing spondylitis: a population-based matched cohort study  a1373-80 v74  a0003-4967