Success and failure after surgery of degenerative disease of the lumbar spine: an operational definition based on satisfaction, pain, and disability from a prospective cohort oleh Albert V B Brasil, Maiara Anschau Floriani, Ericson Sfreddo, Tobias Ludwig do Nascimento, Andriele Abreu Castro, Luana Giongo Pedrotti, Marina Bessel, Juçara Gasparetto Maccari, Mohamed Parrini Mutlaq, Luiz Antonio Nasi