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. 2017 Oct 11;7(10):e018394. doi: 10.1136/bmjopen-2017-018394

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International collaboration. (A) Net diagram of international ectopic pregnancy-related collaborations. Line width and grey scale encode numbers of ectopic pregnancy-related collaborations. Numbers in brackets indicate number of ectopic pregnancy-related publications of a specific country/number of ectopic pregnancy-related collaboration articles of a specific country. (B) Timely evolution of number of ectopic pregnancy-related international collaborations per year.