Todorova, Krassimira
Metodiev, Metodi V.
Metodieva, Gergana
Mincheff, Milcho
Fernández, Nelson
Hayrabedyan, Soren http://orcid.org/0000-0002-2147-1982
Funding for this research was provided by:
Bulgarian National Science Fund (DMU 03/27)
Article History
Received: 26 July 2016
Accepted: 20 December 2016
First Online: 3 January 2017
Compliance with Ethical Standards
:
: The authors declare no conflict of interest.
Free to read: This content has been made available to all.