Sampling 'hard-to-reach' populations in health research: yield from a study targeting Americans living in Canada

BackgroundSome populations targeted in survey research can be hard to reach, either because of lack of contact information, or non-existent databases to inform sampling. Here, we present a methodological "case-report" of the yield of a multi-step survey study assessing views on health care among American emigres to Canada, a hard-to-reach population.MethodsTo sample this hard-to-reach population, we held a live media conference, supplemented by …