Funding for this research was provided by:
Sahlgrenska Universitetssjukhuset (LUA)
Article History
Received: 30 December 2018
Accepted: 27 March 2019
First Online: 6 April 2019
Compliance with ethical standards
:
: Eva-Corina Caragounis, Yao Xiao and Hans Granhed declare that they have no conflict of interest.
: The study was performed in accordance with the 1964 Helsinki Declaration and approved by the Research Ethical Committee, Gothenburg University, Gothenburg, Sweden (829-17).