For citations:

Kurbanmagomedov MK, Sakharova KV, Demina AB, Erdes SF. Assessment of spine mobility in patients with ankylosing spondylitis by ultrasound scanning (preliminary data). Sovremennaya Revmatologiya=Modern Rheumatology Journal. 2021;15(6):67-71. (In Russ.) https://doi.org/10.14412/1996-7012-2021-6-67-71