About the Authors

Karel Kleisner

karel.kleisner@natur.cuni.cz

Affiliation Department of Philosophy and History of Science, Faculty of Science, Charles University in Prague, Czech Republic

Veronika Chvátalová

Affiliation Department of Philosophy and History of Science, Faculty of Science, Charles University in Prague, Czech Republic

Jaroslav Flegr

Affiliation Department of Philosophy and History of Science, Faculty of Science, Charles University in Prague, Czech Republic

Competing Interests

The third author of this study, Jaroslav Flegr, head of IRB of the Faculty of Science, Charles University, was involved in the process of ethical evaluation of Karel Kleisner's project in March, 2010. He was not involved in the research at the time. He and his PhD student, Veronika Chvátalová, joined the project two years later, in May 2012. Karel Kleisner's research has been subject to a process of ethical re-evaluation after this point and Jaroslav Flegr was not involved in this evaluation.

Author Contributions

Conceived and designed the experiments: JF VC KK. Performed the experiments: VC KK. Analyzed the data: KK. Wrote the paper: KK JF.