Foster grandmothers in the premature nursery.
D000328:Adult; D000368:Aged; D001835:Body Weight; D005260:Female; D006801:Humans; D007224:Infant Care; D007231:Infant, Newborn; D007234:Infant, Premature; D007363:Intensive Care Units, Neonatal; D007902:Length of Stay; D008297:Male; D010812:Physical Stimulation