%0 Journal Article %T Comparison of the population excess fraction of Chlamydia trachomatis infection on pelvic inflammatory disease at 12-months in the presence and absence of chlamydia testing and treatment: Systematic review and retrospective cohort analysis %A B. Nancy Yu %A Bethan Davies %A Helen Ward %A Henrik Westh %A James Blanchard %A Katy M. E. Turner %A Maria Fr£żlund %A Stella Leung %A Thomas Benfield %A on behalf of the Danish Chlamydia Study %J Archive of "PLoS ONE". %D 2017 %R 10.1371/journal.pone.0171551 %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5310913/