From initiating injecting drug use to regular injecting: Retrospective survival analysis of injecting progression within a sample of people who inject drugs regularly.

O'Keefe D, Horyniak D, Dietze P

Formal and informal maternal health care: comparing the service provision of health facilities and village health volunteers in East Sepik Province.

O'Keefe D, Davis J, Yakuna G, Van Gemert C, Morgan C

A response to: Self-reported and actual hepatitis C virus infection status.

O'Keefe D, Aitken C, Higgs P, Dietze P

Concordance between self-reported and actual hepatitis C virus infection status in a cohort of people who inject drugs.

O'Keefe D, Aitken C, Higgs P, Dietze P