CD4 count at antiretroviral therapy initiation and the risk of loss to follow-up: results from a multicentre cohort study
Anna Grimsrud, Morna Cornell, Michael Schomaker, Matthew P Fox, Catherine Orrell, Hans Prozesky, Kathryn Stinson, Frank Tanser, Matthias Egger, Landon Myer
J Epidemiol Community Health Jun 2016, 70 (6) 549-555; DOI: 10.1136/jech-2015-206629