Freitas Amorim, A. I.; Rocha Melo, J.; Bettencourt Abreu , J.; Alves Caldeira , M. F. . Pulsed Radiofrequency of Genicular Nerves Guided by Ultrasound: Three Different Cases: Pulsed Radiofrequency in Chronic Knee Pain. Rev Soc Port Anestesiol 2023, 32.