Constant, C <br/><br/>
Environmental tobacco smoke (ETS) exposure and respiratory morbidity in school age children.  [electronic resource] 

 -  Revista portuguesa de pneumologia   
 - 20-6 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>2172-6825 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Air Pollution<br/>Child<br/>Child, Preschool<br/>Environmental Exposure--adverse effects<br/>Female<br/>Humans<br/>Male<br/>Respiratory Tract Diseases--epidemiology<br/>Retrospective Studies<br/>Tobacco Smoke Pollution--adverse effects