%0 Journal Article %T Real-time ultrasound evaluation of CORE muscle activity in a simultaneous contraction in subjects with non-specific low back pain and without low-back pain. Protocol of an observational case-control study %A Cervera-Cano, María %A Sáez-García, María Carmen %A Valcárcel-Linares, David %A Fernández-Carnero, Samuel %A López-González, Luis %A Gallego-Izquierdo, Tomás %A Pecos-Martin, Daniel %J PLoS ONE %V 18 %N 8 %D 2023-08-10 %I Public Library of Science %~ DeepDyve