Landgren, Valdemar
Fernell, Elisabeth
Gillberg, Christopher
Landgren, Magnus
Johnson, Mats
Funding for this research was provided by:
University of Gothenburg
Article History
Received: 2 November 2020
Accepted: 5 March 2021
First Online: 22 March 2021
Declarations
:
: The research protocol including a waiver of informed consent for this registry-based study was approved from the regional ethics review board of Gothenburg university (Dnr 172–18). The research was performed in accordance with the Declaration of Helsinki.
: Not applicable.
: Authors declare that they have no competing interests.