Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article at http://dx.doi.org/10.1080/10428194.2016.1213832.
Funding
This work was supported by: i. funds from the Faculty of Medicine MU to junior researchers Ivana Jeziskova and Veronika Janeckova, ii. Ministry of Health, Czech Republic - conceptual development of research organization [FNBr, 65269705], iii. grant [MUNI/A/1028/2015], iv. Ministry of Health of the Czech Republic, grant nr. [15-25809A].