Personalised rehabilitation to improve return to work in patients with persistent spinal pain syndrome type II after spinal cord stimulation implantation: a study protocol for a 12-month randomised controlled trial-the OPERA study. - Moens M; Goudman L; Van de Velde D; Godderis L; Putman K; Callens J; Lavreysen O; Ceulemans D; Leysen L; De Smedt A (Trials, 2022)