We targeted experts from Canada, the USA, Australia and New Zealand to determine representative aggregate priors across the regions in the BIPED study, avoiding selection bias. Participants were eligible for the elicitation workshop if they (i) were identified as experts in bronchiolitis and its treatment and (ii) had experience in paediatric emergency medicine (PEM). Participants were excluded if they had extensive prior involvement with the BIPED study, i.e. serving as a site principal investigator. Potential participants were invited to contribute by email. We aimed to recruit between 10 and 20 experts to ensure a breadth of experience in terms of geography and speciality [14, 47].
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