Acknowledgement
This work was funded by Charles University, Cooperatio Program, research area Maternal and Childhood Care. The funders did not have a role in the collection, analysis and interpretation of data and in the writing of the manuscript. The authors would like to thank to Ing. Stanislav Kormunda for statistical analysis.
Author disclosure/conflict of interest: The authors declare no conflicts of interests.
Contribution to authorship: ZR – study design, data collection, data analysis, manuscript writing, AMV – patient recruitment, data collection, data analysis, manuscript editing, MS – data collection, manuscript editing, VK – study design, manuscript editing.
Details of Ethics approval: date of approval: October 6th 2016, number 411/2016
Clinical trial registration: registered in October 21st 2016, initial participant enrollment November 14th 2016, clinical trial identification number: NCT02943525, URL of the registration site: https://clinicaltrials.gov/study/NCT02943525
Data availability statement: Deidentified data was uploaded to the Mendeley Data repository, doi: 10.17632/bnz2kcfkm2.1