Distribution of HIV-1 subtypes in Sweden between 1983 and 2012.

<p>Final dataset included <i>pol</i> sequences (length >500 nt) from 3967 HIV-1 infected patients. HIV-1 subtyping was determined by three methods (see method section). The sequences were designated as pure subtypes [A (A1 and A2), B, C, D, F (F1 and F2), G, H, J, and K], circulating recombinant forms (01_AE, 02_AG, 03_AB, 06_cpx, 10_CD, 11_cpx, 12_BF, 13_cpx, 18_cpx, 20_BG, 24_BG, 25_cpx, 33_01B, 34_01B, 37_cpx) and unique recombinant forms (URFs).