Infant admissions to hospital and maternal smoking.

Age Factors Birth Order Birth Weight Bronchitis/epidemiology Child, Hospitalized Environmental Pollution Female Gastroenteritis/epidemiology Humans Infant Infant, Newborn Infections/epidemiology Israel Maternal-Fetal Exchange Morbidity Pneumonia/epidemiology Poisoning/epidemiology Pregnancy Prenatal Diagnosis Prospective Studies Respiratory Tract Infections/epidemiology,etiology Seasons Smoking/complications Social Class Wounds and Injuries/epidemiology