How important is JAK1 selectivity

CME: This supplement is CME Accredited. To receive a CME certificate of participation, you should:  Read all the papers in the supplement Register or log in at www.paradigmmc.com/962 to complete and submit the post activity assessment. You must answer 70% of the questions correctly to earn credit. You will have unlimited opportunities to successfully complete the assessment. You will receive a maximum of 7.0 AMA PRA Category 1 CreditsTM upon successful completion of the assessment.