Factors contributing to neonatal mortality reduction in three regions in Ghana: a mixed-methods study using the Lives Saved (LiST) modelling tool oleh Emma Sacks, Kwame Sakyi, Prince G Owusu, Catherine Ohrt, Lydia Ademuwagun, Kristin Watkoske, Celeste Zabel, Amos Laar, Mufaro Kanyangarara