1. Kankasova MN, Mokhova OG, Pozdeyeva OS Frequently ill children: the view of the infectious diseases. Practical medicine. 2014;9(85): 67-71. (in Russ.)
2. Bulgakova VA, Balabolkin II, Revenko IМ. Current state of the problem of recurrent respiratory infections. Actual questions of respiratory medicine: abstracts of the VI scientificpractical conference.M.;2014. (in Russ.)
3. Vasilevsky IV. Rehabilitation of often ill children. Minsk: BelMAPO; 2006. (in Russ.)
4. Znamenskaya AA, Fomina LV, Uchaikin VF, Fetisov LY, Kladova OV, Kharlamova FS. Treatment and prevention of acute respiratory infections in sickly children. Attending physician. 2011;1:13-20. (in Russ.)
5. Delyagin VM. Repeated respiratory infections in children (often ill children). RMJ. 2013;21(25):1237-1240. (in Russ.)