Development of an international external quality assurance program for HIV-1 incidence using the Limiting Antigen Avidity assay. oleh Sheila M Keating, Wes Rountree, Eduard Grebe, Andrea L Pappas, Mars Stone, Dylan Hampton, Christopher A Todd, Marek S Poniewierski, Ana Sanchez, Cassandra G Porth, Thomas N Denny, Michael P Busch, EQAPOL Limiting Antigen (LAg) Incidence Assay External Quality Assurance (EQA) Program