Effects of selection bias on outcomes at referral centers.
Sepkowitz
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D015982:Bias; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D015931:Intensive Care, Neonatal; D010043:Outcome and Process Assessment, Health Care; D011247:Pregnancy; D012017:Referral and Consultation; D015983:Selection Bias