About the Authors

Dana S. Forcey

dforcey@student.unimelb.edu.au (DSF); CBradshaw@mshc.org.au (CSB)

DSF and SMW are joint first authors on this work.

Affiliations Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia, Melbourne School of Population and Global Health, The University of Melbourne, Carlton, Victoria, Australia

Sandra M. Walker

DSF and SMW are joint first authors on this work.

Affiliations Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia, Melbourne School of Population and Global Health, The University of Melbourne, Carlton, Victoria, Australia

Lenka A. Vodstrcil

Affiliations Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia, Melbourne School of Population and Global Health, The University of Melbourne, Carlton, Victoria, Australia

Christopher K. Fairley

Affiliations Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia, Central Clinical School, Monash University, The Alfred Centre, Melbourne, Victoria, Australia

Jade E. Bilardi

Affiliations Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia, Central Clinical School, Monash University, The Alfred Centre, Melbourne, Victoria, Australia

Matthew Law

Affiliation The Kirby Institute, The University of New South Wales, Darlinghurst, New South Wales, Australia

Jane S. Hocking

Affiliation Melbourne School of Population and Global Health, The University of Melbourne, Carlton, Victoria, Australia

Katherine A. Fethers

Affiliation Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia

Susan Petersen

Affiliation Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia

Clare Bellhouse

Affiliation Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia

Marcus Y. Chen

Affiliations Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia, Central Clinical School, Monash University, The Alfred Centre, Melbourne, Victoria, Australia

Catriona S. Bradshaw

dforcey@student.unimelb.edu.au (DSF); CBradshaw@mshc.org.au (CSB)

Affiliations Melbourne Sexual Health Centre, Alfred Health, Carlton, Victoria, Australia, Melbourne School of Population and Global Health, The University of Melbourne, Carlton, Victoria, Australia, Central Clinical School, Monash University, The Alfred Centre, Melbourne, Victoria, Australia

Competing Interests

Co-author Professor Matthew Law is a PLOS ONE Editorial Board member; this does not alter the authors' adherence to PLOS ONE Editorial policies and criteria.

Author Contributions

Conceived and designed the experiments: CSB CKF JSH KAF SMW. Analyzed the data: DSF LAV. Wrote the paper: DSF SMW LAV CSB. Were responsible for recruiting participants and the daily running of the study: SMW LAV JEB CSB SP KAF CB. Contributed statistical advice and support for data analyses: JSH ML. Made critical revisions to the manuscript: CKF JSH ML MYC JEB CB SP KAF.