$ perl dbentry_test.pl
GENE ENSG00000133103
Use of uninitialized value in printf at dbentry_test.pl line 15.
        XREF OTTHUMG00000016768 ()
Use of uninitialized value in printf at dbentry_test.pl line 15.
        XREF COG6 ()
TRANSCRIPT ENST00000416691
Can't locate object method "add_linkage_type" via package "Bio::EnsEMBL::Identit
yXref" at /cygdrive/c/Bioinformatics/Ensembl/src/ensembl/modules/Bio/EnsEMBL/DBS
QL/DBEntryAdaptor.pm line 1262.