1. Scientific Research Institute of Children's Infections, Saint Petersburg, Russia
2. Saint Petersburg Branch of Vavilov Institute of General Genetics, Saint Petersburg, Russia
3. Saint Petersburg State University, Saint Petersburg, Russia
4. Research Institute for Physical-Chemical Medicine, Moscow, Russia
5. Istituto Superiore di Sanità, Rome, Italy
6. North-Western State Medical University named after I. I. Mechnikov, Saint Petersburg, Russia