Retracted: Delivery outcome after trial of labor in nulliparous women over 40 years of age - a population-based study.

Delivery outcome after trial of labor in nulliparous women over 40 years of age - a population-based study by Victoria Ankarcrona, Daniel Altman, Anna-Karin Wikström, Bo Jacobsson & Sophia Brismar Wendel (https://doi.org/10.1111/aogs.13379). The above article from Acta Obstetricia et Gynecologica Scandinavica, published online on 17 May 2018 in Wiley Online Library (http://wileyonlinelibrary.com) has been withdrawn by agreement between the authors, the Journal Editor-in-Chief, Ganesh Acharya and John Wiley & Sons Ltd. The withdrawal has been agreed at the request of the authors, since an error in the classification of parity was discovered in the dataset used to produce this report, making the conclusions invalid. [ABSTRACT FROM AUTHOR]