Acceleration of bone repair by pulsed sine wave ultrasound: animal, clinical, and mechanistic studies - Pilla, A A; Figueiredo, M; Nasser, P; Alves, José Marcos; Ryaby, J T; Klein, M; Kaufman, J J; Siffert, R S; Kristiansen, T; Heckman, J (Electromagnetics in Medicine and Biology, 1991)