Prophylaxis vs. on-demand treatment with BAY 81-8973, a full-length plasma protein-free recombinant factor VIII product: results from a randomized trial (LEOPOLD II) - Kavakli, K; Yang, R; Rusen, L; Beckmann, H; Tseneklidou-Stoeter, D; Maas Enriquez, M; LEOPOLD II Study Investigators (J Thromb Haemost, 2015)