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[\'Institute of Perinatology and Pediatrics, Almazov National Medical Research Centre, St. Petersburg, Russia.\', \'Syktyvkar State University named after Pitirim Sorokin, Syktyvkar, Russia.\', \'Rostov Medical State University, Rostov-on-Don, Russia.\', \'Regional Childrens Clinical Hospital, Rostov-on-Don, Russia.\', \'Republican Childrens Clinical Hospital, city of Syktyvkar, Russia.\']
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