Give me one excellent research article from pubmed for each of the following study designs: Experimental,case series,correlation(ecological), case control on the topic polio Give me short and crisp content on the presentation topic in the following criteria Your presentation should be based on a research topic Research title,author,year the research design: Methodology which includes the study population; the sampling method; the data collection and analysis methods Then results and critical findings the main findings, as well as the strengths and limitations of the studies, where applicable.