Machado, E. S., Leite, R., Santos, C. C. dos, Artuso, G. L., Gluszczak, F., Jesus, L. G. de, Caldas, J. M. P., & Bredemeier, M. (2019). Turn down - turn up: a simple and low-cost protocol for preparing platelet-rich plasma. Clinics, 74, e1132. https://journals.usp.br/clinics/article/view/162073