Magnetic resonance imaging
Prior to enrollment in the trial, participants were asked to conduct magnetic resonance image (MRI; T2 Turbo Spin Echo with long band width; SIEMENS 1.5T) with the following scanning sequence (slice thickness: 3 mm, TR: 9350, TE: 102; flip angle: 150) for pre-screening purpose. MRI was conducted to verify the injury site and determine the extent of injury (Supplementary Fig. 