Pattern of “sleep spindles” in obstructive sleep apnea patients I. Madaeva, O. Berdina, E. Titova and L. Kolesnikova Eur. Phys. J. Spec. Top., 233 3 (2024) 699-703 Published online: 15 December 2023 DOI: 10.1140/epjs/s11734-023-01049-3