“Testing, Testing”: Multiple HIV-Positive Tests among Patients Initiating Antiretroviral Therapy in Ethiopia oleh Sarah Kulkarni MPH, Olga Tymejczyk MPH, Tsigereda Gadisa MD, Maria Lahuerta PhD, MPH, Robert H. Remien PhD, Zenebe Melaku MD, Wafaa El-Sadr MD, MPH, Batya Elul PhD, MSc, Denis Nash PhD, MPH, Susie Hoffman DrPH, MPH