Respiratory function measurements in infants: measurement conditions. Working Group of the European Respiratory Society and the American Thoracic Society

*Hopital Antoine Beclere, Clamart, France. **Institute of Child Health, University of London, London, UK. †Dept of Child Health, Leicester Royal Infirmary, Leicester, UK. ††Dept of Pediatrics, UMDNJ-Robert Wood Johnson Medical School, New Brunswick, NJ, USA. §Children's Hospital of Pittsburgh, Pittsburgh, PA, USA. Chairmen of the Working Group: J. Stocks, London, UK; W. Morgan, Tucson, USA. This paper is being copublished and copyrighted with the Amercian Journal of Respiratory and Critical Care Medicine. Introduction