Table 2 The Assessment Criteria of HER2 Status.

3+

\( > \)10% tumor cells show complete staining (staining completeness \(\in [0.9,\,1]\)).

2+

\( > \)10% tumor cells show moderate staining (staining completeness \(\in [0.7,\,9)\)).

1+

\( > \)10% tumor cells show incomplete staining (staining completeness \(\in [0.5,\,0.7)\)).

0

>90% tumor cells are unstained (staining completeness \(\in [0,\,0.5)\)).