respiratory function ( forced vital capacity-fvc ; forced expired volume in one second-fev1 ; maximal mid-expiratory flow-demm ; peak flow-dp ; maximal expiratory flow at 75-50-25 % of vital capacity cv-demx ) was studied in children of comparable age , sex and height ( 9 to 12 years ) in a polluted zone ( the exposed group n = 223 ) and a neighboring non-polluted zone ( the control group n = 211 ) in the north of lorraine .
C0035203
respiratory function
C0231800
expiratory