Funding for this research was provided by:
Karolinska Institutet (C741020002)
Received: 21 January 2018
Accepted: 29 October 2018
First Online: 14 November 2018
Ethics approval and consent to participate
: Ethical approval (file number S545) was obtained from the Tongji medical college of Huazhong University of Science & Technology’s (China) ethics committee in November 2012. All participants were informed about the aim of this study and the right to withdraw at any time with the written consent. The data were collated and analyzed after their verbal agreement.
: Not applicable.
: The authors declare that they have no competing interests.
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