1. Protocol for an OpenSAFELY cohort study collecting patient-reported outcome measures using the TPP Airmid smartphone application and linked big data to quantify the health and economic costs of long COVID (OpenPROMPT). Issue 2 (17th February 2023) Authors: Herrett, Emily; Tomlin, Keith; Lin, Liang-Yu; Tomlinson, Laurie A; Jit, Mark; Briggs, Andrew; Marks, Michael; Sandmann, Frank; Parry, John; Bates, Christopher; Morley, Jessica; Bacon, Seb; Butler-Cole, Benjamin; Mahalingasivam, Viyaasan; Dennison, Alan; Smith, Deb; Gabriel, Ethan; Mehrkar, Amir; ... Journal: BMJ open Issue: Volume 13:Issue 2(2023) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗