academic article

• Breastfeeding reduces risk of respiratory illness in infants..  American journal of epidemiology.  147:863-870. 1998
• Nitrogen dioxide and respiratory illness in children. Part III: Quality assurance in an epidemiologic study..  Research report (Health Effects Institute).  :1-31. 1994
• Nitrogen dioxide and respiratory illnesses in infants..  The American review of respiratory disease.  148:1258-1265. 1993