1. Primary prevention of asthma and allergy
Syed Hasan Arshad, DM, FRCP 
Journal of Allergy and Clinical Immunology 
Volume 116, Issue 1, Pages 3-14 (July 2005)
DOI: /j.jaci
Copyright © 2005 American Academy of Allergy, Asthma and Immunology Terms and Conditions

2. Fig 1 Schematic diagram of steps for primary and secondary prevention.
Journal of Allergy and Clinical Immunology  , 3-14DOI: ( /j.jaci )
Copyright © 2005 American Academy of Allergy, Asthma and Immunology Terms and Conditions