Epidemiological and viral characteristics of undiagnosed HIV infections in Botswana oleh Lynnette Bhebhe, Sikhulile Moyo, Simani Gaseitsiwe, Molly Pretorius-Holme, Etienne K. Yankinda, Kutlo Manyake, Coulson Kgathi, Mompati Mmalane, Refeletswe Lebelonyane, Tendani Gaolathe, Pamela Bachanas, Faith Ussery, Mpho Letebele, Joseph Makhema, Kathleen E. Wirth, Shahin Lockman, Max Essex, Vlad Novitsky, Manon Ragonnet-Cronin