PT - JOURNAL ARTICLE ED - , TI - Correction: <em>4-year results from the RAPID-PsA phase 3 randomised placebo-controlled trial of certolizumab pegol in psoriatic arthritis</em> AID - 10.1136/rmdopen-2017-000582corr1 DP - 2018 Mar 22 TA - RMD Open PG - rmdopen-2017-000582corr1 VI - 4 IP - 1 4099 - http://rmdopen.bmj.com/content/4/1/rmdopen-2017-000582corr1.short 4100 - http://rmdopen.bmj.com/content/4/1/rmdopen-2017-000582corr1.full SO - RMD Open2018 Mar 22; 4