High prevalence of pre-treatment HIV drug resistance in Papua New Guinea: findings from the first nationally representative pre-treatment HIV drug resistance study oleh Janet Gare, Ben Toto, Percy Pokeya, Linh-Vi Le, Nick Dala, Namarola Lote, Bangan John, Abel Yamba, Kevin Soli, Joshua DeVos, Heather Paulin, Nick Wagar, Du-Ping Zheng, Takeshi Nishijima, Peniel Boas, Angela Kelly-Hanku, Anup Gurung