TY - GEN T1 - OpenSAFELY: The impact of COVID-19 on azathioprine, leflunomide, and methotrexate monitoring, and factors associated with change in monitoring rate T2 - Cold Spring Harbor Laboratory UR - http://dx.doi.org/10.1101/2023.06.06.23290826 PY - 2023/06/07 AU - Brown AD AU - Fisher L AU - Curtis HJ AU - Wiedemann M AU - Hulme WJ AU - Hopcroft LEM AU - Cunningham C AU - Speed V AU - Costello RE AU - Galloway JB AU - Russell MD et al ED - DO - DOI: 10.1101/2023.06.06.23290826 Y2 - 2024/09/19 ER -