RT Journal Article SR Electronic T1 Correspondence on ‘Systemic evaluation of the relationship between psoriasis, psoriatic arthritis and osteoporosis: observational and Mendelian randomisation study’ JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP annrheumdis-2020-218856 DO 10.1136/annrheumdis-2020-218856 A1 Young Ho Lee YR 2020 UL http://ard.bmj.com/content/early/2020/09/20/annrheumdis-2020-218856.abstract AB