Factors associated with delayed presentation to healthcare facilities for Lassa fever cases, Nigeria 2019: a retrospective cohort study oleh Nastassya L. Chandra, Hikaru Bolt, Chioma Dan-Nwafor, Oladipupo Ipadeola, Elsie Ilori, Geoffrey Namara, Adebola T. Olayinka, Winifred Ukponu, Akanimo Iniobong, Michael Amedu, Adejoke Akano, Kachikwulu O. Akabike, Uwaifiokun Okhuarobo, Stephen Fagbemi, Emeka Sampson, Sophie Newitt, Neville Q. Verlander, Daniel G. Bausch, Olivier le Polain de Waroux, Chikwe Ihekweazu