In this launch year of HSJ Clinical Leaders, we sought to identify those clinicians making the greatest impact on health policy, service transformation, and innovation. Influence in these areas is highlighted in the supplement and our online graphic using the colour-coded symbols below. The HSJ team prepared a long list of candidates over the spring and a panel of judges was put together with knowledge of influence in healthcare and who represent a broad spectrum of opinion. Judges who are on the list were excluded from conversations about their own inclusion. Click here for the full list.