On "A survey of therapeutic ultrasound..." Wong et al. Phys Ther. 2007;87:986 994

V. J Robertson
2007 Physical Therapy  
4 Freedman B. Equipoise and the ethics of clinical research. N Engl J Med. 1987;317:141-145. 5 Altman DG, Bland JM. Absence of evidence is not evidence of absence. BMJ. 1995;311:485. 6 Brosseau L, Casimiro L, Robinson V, et al. Therapeutic ultrasound for treating patellofemoral pain syndrome. Cochrane Database Syst Rev. 2001;(4):CD003375. 7 Welch V, Brosseau L, Peterson J, et al. Therapeutic ultrasound for osteoarthritis of the knee. Cochrane Database Syst Rev. 2001;(3):CD003132.
doi:10.2522/ptj.2007.87.11.1559.1 fatcat:4qy6xlnqgnf2dccv2twtgrwdwa