Frequency of usage and topics of interest among GHD UTD users. Frequency of usage and topics of interest among GHD UTD users. (A) Histogram showing percentage of users accessing UpToDate at specified frequencies. (B) Share of total usage by topic of medical specialty. Each topic accessed was assigned to a medical specialty using UpToDate's table of contents. GHD UTD, Global Health Delivery UpToDate donation programme; GI, gastrointestinal; Ob/Gyn, obstetrics and gynaecology. Yannis K Valtis et al. BMJ Glob Health 2016;1:e000041 Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/