Author contribution
E.I. Bogdanov, E.G. Mendelevich, A.N. Khabibrakhmanov, G.R. Mukhamedzhanova were attending doctors in the case 1. E.I. Bogdanov, A.N. Khabibrakhmanov were attending doctors in the case 2. E.I. Bogdanov and E.G. Mendelevich conceived the study. G.R. Mukhamedzhanova collected case 1 data in 2015 - 2016. A.N. Khabibrakhmanov collected case 1 and 2 data in 2019, prepared the original draft. E.I. Bogdanov, S.E Bogdanov, and M.A. Mukhamedyarov – draft review and editing, instrumental data analyzing. All authors read and approved the final manuscript.