Review

The effects of low-intensity pulsed ultrasound and pulsed electromagnetic fields bone growth stimulation in acute fractures: a systematic review and meta-analysis of randomized controlled trials.

Arch Orthop Trauma Surg. 2014 Aug 1;134(8):1093-106.
Review

Low-intensity pulsed ultrasonography versus electrical stimulation for fracture healing: a systematic review and network meta-analysis.

Can J Surg. 2014 Jun 1;57(3):E105-18.
Randomized Controlled Trial

Electrical stimulation for long-bone fracture-healing: a meta-analysis of randomized controlled trials.

J Bone Joint Surg Am. 2008 Nov 1;90(11):2322-30.