/usr/share/doc/python-vtkgdcm/changelog.Debian.gz is in python-vtkgdcm 2.6.3-3ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/python-vtkgdcm/../libgdcm2.6/changelog.Debian.gz
/usr/share/doc/python-vtkgdcm/../libgdcm2.6/changelog.Debian.gz