Machado, G. C., Maher, C. G., Ferreira, P. H., Pinheiro, M. B., Lin, C. C., Day, R. O., . . . Ferreira, M. L. (2015). Efficacy and safety of paracetamol for spinal pain and osteoarthritis: Systematic review and meta-analysis of randomised placebo controlled trials. BMJ.

Machado, Gustavo C., Chris G. Maher, Paulo H. Ferreira, Marina B. Pinheiro, Chung-Wei Christine Lin, Richard O. Day, Andrew J. McLachlan, and Manuela L. Ferreira. "Efficacy and Safety of Paracetamol for Spinal Pain and Osteoarthritis: Systematic Review and Meta-analysis of Randomised Placebo Controlled Trials." BMJ 2015.

Machado, Gustavo C., et al. "Efficacy and Safety of Paracetamol for Spinal Pain and Osteoarthritis: Systematic Review and Meta-analysis of Randomised Placebo Controlled Trials." BMJ 2015.