Protocol for the Redefining Maternal Anemia in Pregnancy and Postpartum (ReMAPP) study: A multisite, international, population-based cohort study to establish global hemoglobin thresholds for maternal anemia - Emily R. Smith; Zahra Hoodbhoy; Aneeta Hotwani; Fyezah Jehan; Amna Khan; Imran Nisar; Nida Yazdani; Santosh Joseph Benjamin; Anne George Cherian; Venkata Raghava Mohan; Sunitha Varghese; Balakrishnan Vijayalekshmi; et al. (PLoS ONE, 2025)