the set of Coherent Files lists
* const SerieHeader::GdcmFileList &GetGdcmFileList() is kept, for backwards
compatibility (it returns the *first* Coherent Files list,
the set of Coherent Files lists
* const SerieHeader::GdcmFileList &GetGdcmFileList() is kept, for backwards
compatibility (it returns the *first* Coherent Files list,