Phylogenetic neighbor-joining tree for HIV-1 pol sequences obtained from DBSs of MSM in Hong Kong.

<p>The reference sequences for classifying HIV-1 genotypes were included and were originally obtained from the NIH/NIAID–funded HIV Databases. The source of HIV-1 strains is color-coded. The horizontal branch was drawn in accordance with their relative genetic distances as indicated by the bar scale. The vertical lines are purely for clarity of the tree presentation.</p

Sexually transmitted diseases (STDs) among MSM in Hong Kong from March 2010 to February 2011.

<p>The unknown groups refer to the participants who had not been tested; these participants were excluded from the analysis.</p><p>‡Comparison of distribution between HIV-1 positive versus HIV-1 negative in each subcategory. Chi-square test when all cell frequency>10, otherwise Fisher’s exact test was employed. Bold numbers indicate statistical significance.</p><p>Sexually transmitted diseases (STDs) among MSM in Hong Kong from March 2010 to February 2011.</p