Referral of mothers and infants for intensive care.
D003422:Critical Care; D036861:Delivery, Obstetric; D004739:England; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D011247:Pregnancy; D012017:Referral and Consultation; D014187:Transportation of Patients