.Publisheru00e2 $ s keep in mind Springer Attribute stays neutral for jurisdictional cases in released charts and institutional affiliations.This is a review of: Hanson, C. et al. A time-stratified, caseu00e2 $ "crossover research study of warmth visibility and perinatal mortality from 16 hospitals in sub-Saharan Africa. Nat. Medication. https://doi.org/10.1038/s41591-024-03245-7 (2024 ).