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(1.1.70, 01:00) THE LANCET:
 "Effects of technology or maternal factors on perinatal outcome after assisted fertilisation: a population-based cohort study":
 
 Liv Bente Romundstad, Pål R Romundstad, Arne Sunde, Vidar von Düring, Rolv Skjærven, David Gunnell, Lars J Vatten
 
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