Lopes, T., Silva, W., Ribeiro, S., Figueiredo, C., Campbell, F., Daltro, G., … Baptista, A. Does Transcranial Direct Current Stimulation Combined with Peripheral Electrical Stimulation Have an Additive Effect in the Control of Hip Joint Osteonecrosis Pain Associated with Sickle Cell Disease? A Protocol for a One-Session Double Blind,... Frontiers in Human Neuroscience, 11, 633. https://doi.org/10.3389/fnhum.2017.00633 (Original work published 2017)