The University of Sheffield launched the FRAX tool in 2008. At that time the University hosted the The World Health Organisation (WHO) Collaborating Centre for Metabolic Bone Diseases (1991-2010), and the FRAX tool is based on data generated from that centre. However, FRAX was neither developed or endorsed by WHO . Any references to the ‘WHO tool’ or to the WHO Collaborating Centre after it finished its work in 2010 are incorrect.