OpenSAFELY: impact of national guidance on switching anticoagulant therapy during COVID-19 pandemic by Ben Goldacre, David Evans, Sam Harper, Alex J Walker, Richard Croker, Liam Smeeth, Rohini Mathur, Krishnan Bhaskaran, Henry Drysdale, Ian Douglas, Harriet Forbes, Elizabeth Williamson, Brian MacKenna, William Hulme, Anna Schultze, Christopher T Rentsch, Seb Bacon, Chris Bates, Helen J Curtis, Amir Mehrkar, Peter Inglesby, Jonathan Cockburn, Laurie Tomlinson, Rosalind M Eggo, John Parry, Frank Hester, Simon Davy, Angel Yun Wong, Caroline Morton, George Hickman, Tom Ward

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Study protocol: Comparison of different risk prediction modelling approaches for COVID-19 related death using the OpenSAFELY platform [version 2; peer review: 2 approved] by Richard Croker, Anna Schultze, Frank Hester, John Parry, Rafael Perera, Sam Harper, Rosalind M. Eggo, Liam Smeeth, Ewout Steyerberg, Caroline Minassian, Ruth Keogh, Karla Diaz-Ordaz, Stephen J.W. Evans, Elizabeth J. Williamson, Krishnan Bhaskaran, John Tazare, Helen I McDonald, Alex J. Walker, Sebastian Bacon, Laurie A. Tomlinson, Helen J. Curtis, Chris Bates, Caroline E. Morton, Harriet Forbes, Amir Mehrkar, Emily Nightingale, Brian D Nicholson, Richard Grieve, Dave Evans, Peter Inglesby, David Harrison, Ben Goldacre, David Leon, Jonathan Cockburn, Brian MacKenna, Rohini Mathur, Will J. Hulme, Nicholas G. Davies, Ian J. Douglas, Jessica Morley, Angel Wong, Christopher T. Rentsch

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