Farooq F, Smith ER, Pan Q et al. Comparison of Masimo Total Hemoglobin SpHb® continuous non-invasive hemoglobin monitoring device with laboratory complete blood count measurement using venous sample: Protocol for an observational substudy of the Pregnancy Risk and Infant Surveillance and Measurement Alliance Maternal and Newborn Health (PRISMA MNH) study [version 2; peer review: 2 approved]. Gates Open Res 2024, 7:50 (https://doi.org/10.12688/gatesopenres.14499.2)