Hello.
You mentioned in your paper that you used 14 joints defined by Human3.6M for computing PA-MPJPE and MPJPE. I wonder those joints are which of the 17 joints in Human3.6M? Did you exclude H36M_NAMES[15] = 'Head', H36M_NAMES[14] = 'Neck/Nose', and H36M_NAMES[12] = 'Spine'?