'Too high, too low': The complexities of using thresholds in isolation to inform precautionary allergen ('may contain') labels.

Address: National Heart & Lung Institute, Imperial College London, London, UK.; Department of Food Science and Technology, Food Allergy Research and Resource Program, University of Nebraska, Lincoln, Nebraska, USA.; Department of Paediatric Respiratory Medicine, Immunology and Intensive Care Medicine, Charité Universitätsmedizin Berlin, Berlin, Germany.; Brooke-Taylor & Co Pty Ltd, Milawa, Victoria, Australia.; Department of Clinical and Experimental Medicine, Section of Pediatrics, University of Pisa, Pisa, Italy.; René Crevel Consulting Limited, Bedford, UK.; Food Allergy Canada, Toronto, Ontario, Canada.; Allergy Action, St Albans, UK.; Netherlands Organisation for Applied Scientific Research TNO, Utrecht, The Netherlands.; Royal College of Surgeons in Ireland and Children's Health Ireland Temple St Hospital Dublin, Dublin, Ireland.; Department of Allergy and Clinical Immunology, 424 General Military Training Hospital, Thessaloniki, Greece.; Food Directorate, Health Canada, Ottawa, Ontario, Canada.; Allergy Unit, Hospital Universitario 12 de Octubre, Madrid, Spain.; Department of Woman and Child Health, Food Allergy Referral Centre Veneto Region, Padua University Hospital, Padua, Italy.; Division of Infection, Immunity and Respiratory Medicine, Manchester Institute of Biotechnology, University of Manchester, Manchester, UK.; Food Allergy Italia, Padua, Italy.; FOCOS-Food Consulting Strategically, Alzenau, Germany.; Nutrition Therapy, Munich, Germany.; NIHR Southampton Biomedical Research Centre, University Hospital Southampton NHS Foundation Trust, Faculty of Medicine, University of Southampton, Southampton, UK.; The David Hide Asthma and Allergy Research Centre, St Mary's Hospital, Isle of Wight, UK.; Allergy & Anaphylaxis Australia, Castle Hill, Hornsby, New South Wales, Australia.; Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, Children's Allergy Service, Evelina London, Guy's and St Thomas' Hospital, London, UK.; Deutscher Allergie- und Asthmabund (DAAB), Mönchengladbach, Germany.; Department of Paediatrics, OLVG Hospital, Amsterdam, The Netherlands.; Department of Food Science and Technology, Food Allergy Research and Resource Program, University of Nebraska, Lincoln, Nebraska, USA.; Remington Consulting Group BV, Utrecht, The Netherlands.