Pregnancy, fetal, and neonatal outcomes after a first booster dose of covid-19 vaccine during pregnancy in Ontario, Canada: population based, retrospective cohort study. - Fell DB; Dimanlig-Cruz S; Török E; Håberg SE; Regan AK; Kaufman JS; Platt RW; Gravel CA; Bruce L; Shah PS; Wilson K; Sprague AE; et al. (BMJ medicine, 2023)