1. Department of Hospital Pediatrics and Department of ENT Diseases, Nizhny Novgorod State Medical Academy, 10/1 Minin and Pozharsky Square, Nizhny Novgorod 603005, Russia
2. Department of Children Diseases, I.M. Sechenov First Moscow State Medical University, 8 Bld. 2 Trubetskaya St., Moscow 119991, Russia
3. Department of Pediatrics, Medical Institute, Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St., Moscow 117198, Russia
4. Russian Academy of Sciences, Department of Pulmonology and Allergology, National Scientific and Practical Centre of Children’s Health, Lomonosovsky Avenue, Moscow 119991, Russia
5. Department of Chemistry, Lobachevsky State University of Nizhny Novgorod, 23 Gagarin Avenue, Nizhny Novgorod 603950, Russia
6. Medical Informatics Research Laboratory of the Higher School of Information Technologies and Information Systems, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Republic of Tatarstan 420008, Russia