1 Department of Diabetes & Endocrinology, St Thomas' Hospital, London, UK.
2 Department of Diabetes, King's College Hospital, London, UK; London Diabetes Clinical Network, NHS England, London, UK.
3 University College London, Royal Free Campus, London, UK; Association of British Clinical Diabetologists, London, UK. Electronic address: dipesh.patel3@nhs.net.
4 Department of Diabetes & Endocrinology, St Thomas' Hospital, London, UK; London Diabetes Clinical Network, NHS England, London, UK.