Preterm labor and birth: An overview | In: Nelson Textbook of Pediatrics |
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National Institute of Child Health and Human Development | Centers for Disease Control and Prevention |
In: Creasy and Resnik's Maternal-Fetal Medicine: Principles and Practice.
27Preterm birth: Inflammation, fetal injury and treatment strategies | Mayo Clinic Guide to Your Baby's First Year |
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In: The Harriet Lane Handbook | Butler Tobah YS expert opinion |
Pertussis: Summary of vaccine recommendations.