Funding for this research was provided by:
Stiftelsen Sven Jerrings Fond
Received: 7 February 2020
Accepted: 22 April 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: Early STOPP was approved by the Stockholm regional ethics committee in Stockholm in March 2009 (file no. 2009/217–31). The parents signed a written consent to be a part of the Early STOPP project and this sub-study falls under the project’s intent.
: Not applicable.
: None of the authors declare competing financial interests.