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Maternal age and severe maternal morbidity: A population-based retrospective cohort study
- Sarka Lisonkova,
- Jayson Potts,
- Giulia M. Muraca,
- Neda Razaz,
- Yasser Sabr,
- Wee-Shian Chan,
- Michael S. Kramer
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- Published: May 30, 2017
- https://doi.org/10.1371/journal.pmed.1002307