Breast-feeding, gastrointestinal and lower respiratory illness in the first two years.

Biology Breast Feeding Cohort Analysis Developed Countries Educational Status Epidemiologic Methods Ethnic Groups Family Size Gastrointestinal Effects Health Incidence Infant Nutrition Interviews Maternal Age Measurement New Zealand Nutrition Oceania Physiology Prospective Studies Pulmonary Effects Records Research Methodology Residence Characteristics Smoking Studies

Australia Breast Feeding Child, Preschool Gastrointestinal Diseases/epidemiology Humans Infant Infant, Newborn Prospective Studies Respiratory Tract Infections/epidemiology Time Factors