Confidential, accessible point-of-care sexual health services to support the participation of key populations in biobehavioural surveys: Lessons for Papua New Guinea and other settings where reach of key populations is limited. - Kelly-Hanku, Angela; Redman-MacLaren, Michelle; Boli-Neo, Ruthy; Nosi, Somu; Ase, Sophie; Aeno, Herick; Nembari, Joshua; Amos, Angelyn; Gabuzzi, Josephine; Kupul, Martha; Williie, Barne; Narokobi, Rebecca; et al. (PLoS ONE, 2020)