BackgroundSequential mixed-mode surveys using both web-based surveys and telephone interviews are increasingly being used in observational studies and have been shown to have many benefits; however. the application of this survey design has not been evaluated in the context of epidemiological case-control studies. ObjectiveIn this paper. we discuss the challenges. https://www.nacrack.com/mega-pick-As-for-Me-and-My-House-Wall-Decal-in-Hebrew-Yahauh-flash-find/