© 2018 Peter Bakalár, Martin Zvonar, Jaromir Sedlacek, Rut Lenkova, Peter Sagat, Lubos Vojtasko, Erika Liptakova, Miroslava Barcalova, published by National Institute of Public Health, Slovenia
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.