For citations:

Voronina I.V., Neretina A.F., Popova I.N. Survival trends for very low and extremely low birth weight infants in the Voronezh Region in 2008 to 2012. Rossiyskiy Vestnik Perinatologii i Pediatrii (Russian Bulletin of Perinatology and Pediatrics). 2015;60(1):27-31. (In Russ.)