Erratum to: Invest New Drugs (2014) 32:535–541

DOI 10.1007/s10637-014-0065-x

In the original version of this article, we have had unintentional mistakes for measuring progression-free survival (PFS). The corrected progression-free survival was 3.7 months (95% CI 2.1-5.3). So, we revised Table 3, Figure 2a, c and manuscript (Results section and Discussion section). We also added secondary endpoints which had been described in the study protocol according to the recommendation by the sponsor (Merck).

Table 3 Response according to RECIST (version 1.1) and survival outcome
Fig. 2
figure 1

a Progression-free survival b Overall survival c Overall survival according to codon 12 and codon 13 KRAS mutations