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. 2019 Apr 4;7:e6679. doi: 10.7717/peerj.6679

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©2019 Xie et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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(A) Diagnostic value of serum SPINK4, CEA, CA125, CA153, CA199 in CRC. (B) Diagnostic value of serum SPINK4 combined with CEA, CA125, CA153 or CA199 in CRC. The data was analyzed using the receiver operating characteristic curve and areas under the curve with 95% confidence interval.