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. 2018 Oct 15;5(2):e000859. doi: 10.1136/openhrt-2018-000859

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© Author(s) (or their employer(s)) 2018. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

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(A) Survival in CCP group compared to non-CCP (NCCP) of known (K) and unknown (U) origin; CCP vs NCCP, p<0.001 (log-rank test); NCCP-K vs NCCP-U p=0.41 (log-rank test). (B) Survival in the ACS group compared to the NCCP group; p<0.001 (log-rank test). ACS, acute coronary syndrome; CCP, cardiac chest pain.