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Journal
Acta Obstet Gynecol Scand
Volume
94
Issue
11
Pages
1203-14
Publication year
2015
Suggested citation
Kallen K, Serenius F, Westgren M, Marsal K. Impact of obstetric factors on outcome of extremely preterm births in Sweden: prospective population-based observational study (EXPRESS). Acta Obstet Gynecol Scand. 2015; 94(11): 1203-14.