Zaichick, Vladimir
Zaichick, Sofia
Article History
Received: 13 December 2017
Accepted: 27 January 2018
First Online: 2 February 2018
Compliance with ethical standards
:
: On behalf of all authors, the corresponding author states that there is no conflict of interest aside from grant funding stated above.
: For this type of study formal consent is not required.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.