Expression of Concern: Plant sex alters Allee effects in aggregating plant parasites

Start, D. and Gilbert, B., Plant sex alters Allee effects in aggregating plant parasites. Oikos, 2018, (https://doi.org/10.1111/oik.04405). This Expression of Concern is for the above article, published online on 10 November 2017 in Wiley Online Library (wileyonlinelibrary.com), and has been published by agreement between the journal Editor in Chief, Nordic Society Oikos, Benjamin Gilbert and John Wiley & Sons Ltd. The decision to express concern has been reached due to discrepancies between the available archived data and the published results, as well as the corresponding author's (Dr. Start, who is responsible for data collection, analysis, and preservation) inability to rectify the missing or omitted data in the archived files.