Djoumerska-Alexieva, Iglika
Roumenina, Lubka
Pashov, Anastas
Dimitrov, Jordan
Hadzhieva, Maya
Lindig, Sandro
Voynova, Elisaveta
Dimitrova, Petya
Ivanovska, Nina
Bockmeyer, Clemens
Stefanova, Zvetanka
Fitting, Catherine
Bläss, Markus
Claus, Ralf
von Gunten, Stephan
Kaveri, Srini
Cavaillon, Jean-Marc
Bauer, Michael
Vassilev, Tchavdar
Article History
Received: 6 November 2014
Accepted: 14 December 2015
First Online: 14 December 2015