Tetravalent antibodies are more potent and efficacious erythropoiesis-stimulating agents than erythropoietin in vivo. - Adams JJ; Blazer LL; Chung J; Karimi M; Davidson T; Blair B; Waddle C; Hokanson CA; Bruce HA; Singer AU; Tombak EM; Gildemann K; et al. (Protein science : a publication of the Protein Society, 2026)