Complicated Odontogenic Infections at 2 District Hospitals in Tonkolili District, Sierra Leone: Protocol for a Prospective Observational Cohort Study (DELAY) oleh Hanna M J L Hazenberg, Jan Henk Dubbink, Issa Sesay, Tom Versteege, Hassan Bangura, Louise K Hoevenaars, Abdul M Falama, Heleen M Koudijs, Rosa Roemers, Emmanuel B Bache, Emil F Kelling, Frieder Schaumburg, Fred K L Spijkervet, Martin P Grobusch