“If we work as a team, there are success stories.” Unpacking team members’ perceptions and experiences of what impacts team performance in a maternal and neonatal quality improvement programme in South Africa, before, and during COVID-19 - Willem Odendaal; Ameena Goga; Mark Tomlinson; Yages Singh; Helen Schneider; Solange Mianda; Shuaib Kauchali; Carol Marshall; Terusha Chetty; Xanthe Hunt (PLOS Global Public Health)