Erratum to: J Gastroenterol (2015) 50:955–961 DOI 10.1007/s00535-015-1046-3

In Table 2, clerical mistakes of the number of patients in low or high than 15.0 ng/ml were made. The number of patients with low than 15.0 ng/ml should be 40, and high should be 25. Table 2 should be shown as follows.

Table 2 Correlation between basic HER2 ECD status response rates for AGC patients treated with trastuzumab

The original version of this article unfortunately contained error in Fig. 4a, the correct Fig. 4a is shown as follows.

Fig. 4
figure 1

Kaplan–Meier analysis of progression-free survival in patients with changes of serum HER2 ECD. a Serum HER2 ECD decline or not; b serum HER2 ECD decline ≥20 % or not