Article History

Received: 15 March 2018

Accepted: 28 March 2019

First Online: 13 August 2019

Change Date: 16 August 2019

Change Type: Update

Change Details: Editorial Note: This is an update of an editorial note issued on August 15. Readers are alerted that the editors are aware of a number of criticisms related to this work. These criticisms are being considered by the editors. The Supplementary Information for this Article is currently unavailable due to concerns regarding the identification of individuals. We will publish an update once our investigation is complete.

Change Date: 29 August 2019

Change Type: Correction

Change Details: An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Change Date: 23 January 2020

Change Type: Update

Change Details: Editorial Note: The Supplementary Information for this Article is now available. The Supplementary Information has been revised to remove individuals’ names from Supplementary Figure 1, Supplementary Figure 6, the ‘Author name disambiguation strategy’ subsection of Supplementary Note 1 and the ‘CCC and CCS in the media’ subsection of Supplementary Note 2.

Competing interests

: The authors declare no competing interests.