Correction to: J Gastroenterol (2018) 53:84–94 https://doi.org/10.1007/s00535-017-1369-3

In the original publication of the article, Table 1 and Figs. 2a, 2b, 3a were published with errors. The correct Table 1 and Figs. 2a, 2b, 3a are given in this correction.

Table 1 Characteristics of the included studies
figure a
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figure c