TY - JOUR KW - clinical trials KW - health economics KW - otolaryngology AU - C. Clarke AU - E. Williamson AU - S. Denaxas AU - J. Carpenter AU - M. Thomas AU - H. Blackshaw AU - A. Schilder AU - C. Philpott AU - C. Hopkins AU - S. Morris AD - Research Department of Primary Care and Population Health, University College London, London, UK caroline.clarke@ucl.ac.uk. Department of Medical Statistics, London School of Hygiene & Tropical Medicine, London, UK. Health Data Research UK, London, UK. Institute of Health Informatics, University College London, London, UK. MRC Clinical Trials Unit at UCL, University College London, London, UK. Primary Care and Population Science, University of Southampton, Southampton, UK. ENT Clinical, Zeist, The Netherlands. NIHR UCLH Biomedical Research Centre, London, UK. Ear Institute, University College London, London, UK. Norwich Medical School, University of East Anglia, Norwich, UK. ENT Department, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, UK. ENT Department, Guy's and St Thomas' NHS Foundation Trust, London, UK. Primary Care Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK. AN - 35135774 BT - BMJ Open C2 - PMC8830221 DO - 10.1136/bmjopen-2021-055603 DP - NLM ET - 2022/02/10 LA - eng M1 - 2 N1 - 2044-6055 Clarke, Caroline S Orcid: 0000-0002-4676-1257 Williamson, Elizabeth Denaxas, Spiros Carpenter, James R Thomas, Mike Blackshaw, Helen Schilder, Anne G M Philpott, Carl M Orcid: 0000-0002-1125-3236 Hopkins, Claire Orcid: 0000-0003-3993-1569 Morris, Stephen Orcid: 0000-0002-5828-3563 MACRO programme team WT_/Wellcome Trust/United Kingdom Journal Article BMJ Open. 2022 Feb 8;12(2):e055603. doi: 10.1136/bmjopen-2021-055603. PY - 2022 SN - 2044-6055 EP - e055603 T2 - BMJ Open TI - Observational retrospective study calculating health service costs of patients receiving surgery for chronic rhinosinusitis in England, using linked patient-level primary and secondary care electronic data VL - 12 ER -