HIV, syphilis and sexual-risk behaviours’ prevalence among in-and out-of-school adolescent girls and young women in Zambia: A cross-sectional survey study oleh Patrick Musonda, Hikabasa Halwiindi, Patrick Kaonga, Alice Ngoma-Hazemba, Matildah Simpungwe, Mable Mweemba, Chowa Tembo, Cosmas Zyambo, John Chisoso, Margaret Munakampe, Powell Choonga, Owen Ngalamika, Mwiche Musukuma, Malizgani P. Chavula, Noah Sichula, Oliver Mweemba, Joseph Mumba Zulu, Henry Phiri