Download Terms and combinations searched included genetic test, gene test

Hudson Supplementary Methods
Search terms used to identify genetic testing laboratories
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Method for estimating total number of eligible directors
Estimating the number of eligible directors in the pool of non-respondents assumes that
equivalent proportions of the respondents from each of the different lists of potential
participants were eligible to participate. If some source lists were unlikely to yield any
eligible directors, then extrapolating from the respondents to the non-respondents would
be invalid. However, similar proportions of respondents from each of the source lists
were eligible - the proportions did not vary significantly from one source list to another.