Yu. A. Gaist
North-Western State Medical University named after I. I. Mechnikov; Children's City Clinical Hospital No. 5 named after N. F. Filatov
Russian Federation

Yulia A. Gaist, postgraduate student, head of Dept, epidemiologist

Dept of Epidemiology, Parasitology and Disinfectology; Epidemiological Dept

St. Petersburg

A. V. Liubimova
North-Western State Medical University named after I. I. Mechnikov
Russian Federation

Anna V. Liubimova, Dr Med Sci (habil.), professor

Dept of Epidemiology, Parasitology and Disinfectology

St. Petersburg

L. V. Belova
North-Western State Medical University named after I. I. Mechnikov
Russian Federation

Lyudmila V. Belova, Dr Med Sci (habil.), professor

Dept of Preventive Medicine and Health Protection

St. Petersburg

E. N. Kolosovskaya
North-Western State Medical University named after I. I. Mechnikov
Russian Federation

Elena N. Kolosovskaya, Dr Med Sci (habil.), professor

Dept of Epidemiology, Parasitology and Disinfectology

St. Petersburg