Initial clinical experience with the IMEX™ circular external skeletal fixation system part II: use in bone lengthening and correction of angular and rotational deformities - Lewis, DD; Radasch, RM; Beale, BS; Stallings, JT; Welch, RD; Samchukov, ML; Lanz, OI (Vet Comp Orthop Traumatol, 1999)