Funding for this research was provided by:
Received: 4 March 2020
Accepted: 15 May 2020
First Online: 16 June 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The study was approved by Regional Ethical Review board in Stockholm, Sweden, who, in accordance with Swedish Law, waived the need for informed consent.