Allergy essentials / edited by Robyn E O'Hehir, MD, PhD, FAHMS, Professor of Allergy, Immunology, and Respiratory Medicine, Monash University and Alfred Hospital, Melbourne, Australia, Stephen T Holgate,, MD, FMedSci, Clinical Professor of Immunopharmacology, Medical Facility in Clinical and Experimental Sciences, Southampton General Hospital, Southampton, United Kingdom, Gurjit K. Khurana Hershey, MD, PhD, Kindervelt Endowed Chair in Asthma Research, Professor of Pediatrics, Director, Division of Asthma Research, Cincinnati Children's Hospital Medical Center, Director, Medical Scientist Training Program, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States, Aziz Sheikh, MD, FMedSci, Professor of Primary Care Research and Development Director and Dean of Data, Usher Institute, University of Edinburgh, Edinburgh, United Kingdom.