Hillel S Koren Editor

Dr. Robert L. Maynard is the Senior Medical Officer for the Department of Health in London, UK BSc MB BCh FRCP FRCPath FFOM FBTS FRSB Honorary Professor, Institute of Public Health, Birmingham University, UK Honorary Principal Fellow, Department of Occupational and Environmental Medicine, National Heart and Lung Institute, London • Fellow of the Royal Society of Biology 1990 • Member of the Royal College of Pathologists 1991 awarded after assessment of published works; Fellow 1999 • Member of the Royal College of Physicians (by distinction) 1996 • Fellow of the Faculty of Occupational and Environmental Medicine, Royal College of Physicians (by distinction) 1997 • Royal College of Physicians: Fellowship by election – May 2002 • Fellow of the British Toxicological Society 2008 Stephen T. Holgate is a Clinical Professor of Immunopharmacology at Southampton General Hospital. Dr. Hillel S. Koren is the Director of the Human Studies Division of the National Health & Environmental Effects Laboratory in Research Triangle Park, North Carolina. Jonathan M. Samet is the Chair of the Department of Epidemiology for the School of Hygiene & Public Health at Johns Hopkins University in Baltimore, Maryland.