ISSN Print 2713-0878
ISSN Online 2713-0886
BIOMEDICAL JOURNAL OF ERMC EASTERN EUROPEAN
National Medical Research Center for Children's Health, Moscow, Russia
Correspondence should be addressed: Yulia V. Solovyova
Lomonosovsky prospect, 2, bld. 1, Moscow, 119296, Russia; ur.liam@42_aluy
Compliance with ethical standards: all schoolgirls submitted the informed consent to study participation.