For citations:
Dydykina IS, Dibrov DA, Nurbaeva KS, Kovalenko PS, Kovalenko AA. Biologically active additives in the 21st century: undenatured type II collagen as an example of good medical practice. Sovremennaya Revmatologiya=Modern Rheumatology Journal. 2020;14(2):131-137. (In Russ.) https://doi.org/10.14412/1996-7012-2020-2-131-137