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. 2018 Dec 1;3(6):e001005. doi: 10.1136/bmjgh-2018-001005

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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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The relationship between physician anaesthesia provider (PAP) quintiles and maternal mortality ratio (MMR) for 198 countries (quintile 1 is 0.1–0.62 PAPs per 100 000; quintile 2: 0.7–2.44; quintile 3: 2.45–6.76; quintile 4: 7.18–15.06; quintile 5: 15.17–54.22).