Text and Data Mining valid from 2019-08-19
Received: 5 May 2019
Accepted: 7 August 2019
First Online: 19 August 2019
Compliance with ethical standards
: Georgy Ivakhov, Alexey Kolygin, Svetlana Titkova, Michail Anurov, and Alexander Sazhin have no conflicts of interest or financial ties to disclose.
: The study was approved by the institutional Ethics Committee of Pirogov Russian National Research Medical University.
: This article does not contain any studies with human participants. No procedures were performed on animals in this study.
: For this type of study, formal consent is not required.