1. Division of Integrative Systems and Digestive Medicine, Department of Surgery and Cancer, Imperial College London, Sir Alexander Fleming Building, South Kensington Campus, London SW7 2AZ, United Kingdom
2. NIHR-BRC Clinical Phenotyping Centre, Department of Surgery and Cancer, Imperial College London, Sir Alexander Fleming Building, South Kensington Campus, London SW7 2AZ, United Kingdom
3. Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, United States
4. Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, St. Mary’s Campus, London W2 1PG, United Kingdom
5. MRC-PHE Centre for Environment and Health, School of Public Health, Imperial College London, St. Mary’s Campus, London W2 1PG, United Kingdom