Affiliation: | (1) North West Research Centre for Hygiene and Public Health, Vtoraya Sovetskaya St. 4, 193036 St. Petersburg, Russia;(2) Parasitological Institute SAS, Hlinkova 3, 04001 Košice, Slovak Republic;(3) Second Clinic for Children and Adolescents, SNP 1, 04011 Košice, Slovak Republic |