Attendance at day care centers increases the risk of childhood pneumonia among the urban poor in Fortaleza, Brazil.  [electronic resource] 

 -  Cadernos de saude publica  Apr 1996 
 - 133-140 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1678-4464 
<br/><br/><label>Standard No.: </label>10.1590/s0102-311x1996000200002  doi