of the revised manuscript (line 32). Comment 2: abstract line 51 What does this mean? Did you only have follow-up on 26 patients? Answer: We apologize for the unclear formulation in the original manuscript. What we meant was that 31 hips out of 38 (82%) were followed up for more than two years. We have clarified this aspect in the revised manuscript (lines 31-34 of the abstract; lines 90-92 of ...

In the background, it appears that dual guidance is novel for LPB which is not true. Both control group and intervention group used dual guidance. This is a practice followed by most clinicians as plexus is usually not visible on ultrasound imaging. In conclusion, wording "excellent" technical choice is too strong. At best we can describe it as promising as the availability of data regarding th...