Are lumbar multifidus fatigue and transversus abdominis activation similar in patients with lumbar disc herniation and healthy controls? A case control study - Ramos, Luiz Armando Vidal; França, Fábio Jorge Renovato; Callegari, Bianca; Burke, Thomaz Nogueira; Magalhães, Maurício Oliveira; Marques, Amélia Pasqual (European Spine Journal, 2016)