EF6901B2-23C7-4AC2-9C23-83B0739DEADDEpidemiological and statistical research on health problems of developing countries: MRC Tropical Epidemiology GroupResearch GrantMR/K012126/1C008C651-F5B0-4859-A334-5F574AB6B57CMRCINCOME_ACTUAL3913896EA95BF58-16C5-4F42-A8C1-702039098266Case-control vaccine effectiveness studies: Preparation, design, and enrollment of cases and controls.Vaccine9995db37758c5b7cad3306193293f618Verani JR2017-01-01http://dx.doi.org/10.1016/j.vaccine.2017.04.03728442231http://ukpmc.ac.uk/abstract/MED/284422310264-410Xhttp://europepmc.org/abstract/MED/284422313525Journal Article/Review5aa1639e531292.19005734