Authors: Caroline A Crowther; Janet E Hiller; John R Moss; Andrew J McPhee; William S Jeffries; Jeffrey S Robinson Journal: N Engl J Med Date: 2005-06-12 Impact factor: 91.245
Authors: Maritta K Pöyhönen-Alho; Kari A Teramo; Risto J Kaaja; Vilho K Hiilesmaa Journal: Eur J Obstet Gynecol Reprod Biol Date: 2005-07-01 Impact factor: 2.435