1. Emil Racovita Institute of Speleology, Bucharest, Romania
2. Department of Aquatic Microbial Ecology, Institute of Hydrobiology, Biology Centre of the Academy of Sciences of the Czech Republic, České Budějovice, Czechia
3. Cluj-Napoca Department, Emil Racovita Institute of Speleology, Cluj-Napoca, Romania
4. Centro Nacional de Investigación sobre la Evolución Humana, Burgos, Spain