Comment on: Development and validation of an alternative ankylosing spondylitis disease activity score when patient global assessment is unavailable. (28th November 2020) - Aranda-Valera, Inmaculada C; Garrido-Castro, Juan L; Ladehesa, Lourdes; Vazquez-Mellado, Janitzia; Zarco, Pedro; Juanola, Xavier; González-Navas, Cristina; Font-Ugalde, Pilar; Castro-Villegas, M Carmen