“…However, reports of high-quality RCTs to evaluate traction therapy are scarce [5,7]. For example, reported studies lacked a randomized comparison group [2,19], had a retrospective design [10,11,15,16], sample sizes were too small [6,10,11], heterogeneous patient groups were studied [3,6,19] or the authors were commercially related to the evaluated therapy [11,16]. Moreover, within this particular field there is still controversy since various different traction techniques and corresponding protocols exist.…”