Defining linkage to care following human immunodeficiency virus (HIV) diagnosis for public health monitoring in Europe Croxford, Sara and Raben, Dorthe and Jakobsen, Stine F and Burns, Fiona and Copas, Andrew and Brown, Alison E and Delpech, Valerie C and on behalf of OptTEST by HIV in Europe, Eurosurveillance, 23, 1700858 (2018), https://doi.org/10.2807/1560-7917.ES.2018.23.48.1700858