For citations:
Bogdan I.V., Gurylina M.V., Chistyakova D.P. Survey Refusals to Participate in Surveys: General Methodological Problems and Specificity of Medical and Sociological Research. Vestnik NSUEM. 2019;(3):240-247. (In Russ.) https://doi.org/10.34020/2073-6495-2019-3-240-247