Robertson, D G <br/><br/>
Universal spacer devices.  [electronic resource] 

 -  Lancet (London, England)  Feb 1994 
 - 480 p.  digital 
<br/><br/> Publication Type: Comment; Letter 
<br/><br/><label>ISSN: </label>0140-6736 
<br/><br/><label>Standard No.: </label>10.1016/s0140-6736(94)92724-3  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Asthma--drug therapy<br/>Child<br/>Equipment Design<br/>Humans<br/>Infant<br/>Nebulizers and Vaporizers