title: The enigma of spontaneous preterm birth.
authors.forename: Alain
authors.initials: A
authors.lastname: Braillon
authors.forename: Susan
authors.initials: S
authors.lastname: Bewley
mesh_terms: D019317:Evidence-Based Medicine; D005260:Female; D019983:Guideline Adherence; D006801:Humans; D011247:Pregnancy; D047928:Premature Birth / Q000209:etiology / Q000517:prevention & control*; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects*