Identification of patients undergoing chronic kidney replacement therapy in primary and secondary care data: validation study based on OpenSAFELY and UK Renal Registry oleh Ben Goldacre, Dorothea Nitsch, Laurie A Tomlinson, Bang Zheng, Brian MacKenna, Amir Mehrkar, Lucy Plumb, Retha Steenkamp, Shalini Santhakumaran, Sebastian Bacon, Viyaasan Mahalingasivam, Caroline Morton, Louis Fisher, Edward PK Parker, Sue Lyon, Linda Gough, Rob Konstant-Hambling