Intra- and inter-subtype HIV diversity between 1994 and 2018 in southern Uganda: a longitudinal population-based study by Kim, S, Kigozi, G, Martin, MA, Galiwango, RM, Quinn, TC, Redd, AD, Ssekubugu, R, Bonsall, D, Ssemwanga, D, Rambaut, A, Herbeck, JT, Reynolds, SJ, Foley, B, Abeler-Dörner, L, Fraser, C, Ratmann, O, Kagaayi, J, Laeyendecker, O, Grabowski, MK