1. Obstetric comorbidity and severe maternal morbidity among Massachusetts delivery hospitalizations, 1998–2013;Somerville;Matern Child Health J,2019
2. Saving lives, improving mothers’ care core report – lessons learned to inform maternity care from the UK and Ireland. Confidential enquiries into maternal deaths and morbidity 2019–21,2023
3. Pregnancy-Related Mortality in the United States, 2011–2013;Creanga;Obstet Gynecol,2017
4. Trends in severe maternal morbidity in the US across the transition to ICD-10-CM/PCS from 2012–2019;Hirai;JAMA Netw Open,2022
5. Trends and disparities in delivery hospitalizations involving severe maternal morbidity, 2006–2015. Healthcare Cost and Utilization Project (HCUP) statistical briefs;Fingar,2006