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2 School of Medical Sciences and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK.
3 Department of Blood Sciences, Walsall Manor Hospital, Walsall, UK.
4 Institute for Applied Clinical Sciences, Keele University, Keele, UK.
5 High Speciality Regional Hospital of Ixtapaluca, Mexico City, Mexico.
6 Choosing Wisely steering group, Academy of Medical Royal Colleges, London, UK.
7 Warwick Medical School, Warwick, UK.
8 School of Medical Sciences and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK; Salford Royal Hospital, Salford M6 8HD, UK. Electronic address: adrian.heald@manchester.ac.uk.
2 School of Medical Sciences and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK.
3 Department of Blood Sciences, Walsall Manor Hospital, Walsall, UK.
4 Institute for Applied Clinical Sciences, Keele University, Keele, UK.
5 High Speciality Regional Hospital of Ixtapaluca, Mexico City, Mexico.
6 Choosing Wisely steering group, Academy of Medical Royal Colleges, London, UK.
7 Warwick Medical School, Warwick, UK.
8 School of Medical Sciences and Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK; Salford Royal Hospital, Salford M6 8HD, UK. Electronic address: adrian.heald@manchester.ac.uk.