Article History
Received: 25 February 2019
Revised: 17 June 2019
Accepted: 13 July 2019
First Online: 19 July 2019
Compliance with ethical standards
: Primary data are available for journal review if requested.
: None of the authors has any potential conflict of interest.
: This study was approved by Stockholm’s Regional Committee for Medical Research Ethics and conformed to the Declaration of Helsinki.