For citations:
Saakyan S.V., Ivanova O.A., Tadevosyan S.S., Tsygankov A.Yu., Olkhova L.V., Ushakova T.L., Polyakov V.G. Survival of retinoblastoma patients: a cohort study by two Russian medical centers. Russian Ophthalmological Journal. 2021;14(1):47-55. (In Russ.) https://doi.org/10.21516/2072-0076-2021-14-1-47-55