/usr/include/ITK-4.5/lapack/complex16/ is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ITK-4.5/lapack/complex16/zdrscl.h
/usr/include/ITK-4.5/lapack/complex16/zgebak.h
/usr/include/ITK-4.5/lapack/complex16/zgebal.h
/usr/include/ITK-4.5/lapack/complex16/zgecon.h
/usr/include/ITK-4.5/lapack/complex16/zgees.h
/usr/include/ITK-4.5/lapack/complex16/zgeev.h
/usr/include/ITK-4.5/lapack/complex16/zgehd2.h
/usr/include/ITK-4.5/lapack/complex16/zgehrd.h
/usr/include/ITK-4.5/lapack/complex16/zgeqr2.h
/usr/include/ITK-4.5/lapack/complex16/zgeqrf.h
/usr/include/ITK-4.5/lapack/complex16/zgesc2.h
/usr/include/ITK-4.5/lapack/complex16/zgetc2.h
/usr/include/ITK-4.5/lapack/complex16/zggbak.h
/usr/include/ITK-4.5/lapack/complex16/zggbal.h
/usr/include/ITK-4.5/lapack/complex16/zgges.h
/usr/include/ITK-4.5/lapack/complex16/zgghrd.h
/usr/include/ITK-4.5/lapack/complex16/zhgeqz.h
/usr/include/ITK-4.5/lapack/complex16/zhseqr.h
/usr/include/ITK-4.5/lapack/complex16/zlacgv.h
/usr/include/ITK-4.5/lapack/complex16/zlacn2.h
/usr/include/ITK-4.5/lapack/complex16/zlacpy.h
/usr/include/ITK-4.5/lapack/complex16/zladiv.h
/usr/include/ITK-4.5/lapack/complex16/zlahqr.h
/usr/include/ITK-4.5/lapack/complex16/zlahrd.h
/usr/include/ITK-4.5/lapack/complex16/zlange.h
/usr/include/ITK-4.5/lapack/complex16/zlanhs.h
/usr/include/ITK-4.5/lapack/complex16/zlarf.h
/usr/include/ITK-4.5/lapack/complex16/zlarfb.h
/usr/include/ITK-4.5/lapack/complex16/zlarfg.h
/usr/include/ITK-4.5/lapack/complex16/zlarft.h
/usr/include/ITK-4.5/lapack/complex16/zlarfx.h
/usr/include/ITK-4.5/lapack/complex16/zlartg.h
/usr/include/ITK-4.5/lapack/complex16/zlascl.h
/usr/include/ITK-4.5/lapack/complex16/zlaset.h
/usr/include/ITK-4.5/lapack/complex16/zlassq.h
/usr/include/ITK-4.5/lapack/complex16/zlaswp.h
/usr/include/ITK-4.5/lapack/complex16/zlatdf.h
/usr/include/ITK-4.5/lapack/complex16/zlatrs.h
/usr/include/ITK-4.5/lapack/complex16/zrot.h
/usr/include/ITK-4.5/lapack/complex16/ztgex2.h
/usr/include/ITK-4.5/lapack/complex16/ztgexc.h
/usr/include/ITK-4.5/lapack/complex16/ztgsen.h
/usr/include/ITK-4.5/lapack/complex16/ztgsy2.h
/usr/include/ITK-4.5/lapack/complex16/ztgsyl.h
/usr/include/ITK-4.5/lapack/complex16/ztrevc.h
/usr/include/ITK-4.5/lapack/complex16/ztrexc.h
/usr/include/ITK-4.5/lapack/complex16/ztrsen.h
/usr/include/ITK-4.5/lapack/complex16/ztrsyl.h
/usr/include/ITK-4.5/lapack/complex16/zung2r.h
/usr/include/ITK-4.5/lapack/complex16/zunghr.h
/usr/include/ITK-4.5/lapack/complex16/zungqr.h
/usr/include/ITK-4.5/lapack/complex16/zunm2r.h
/usr/include/ITK-4.5/lapack/complex16/zunmqr.h