Patient retention and adherence to antiretrovirals in a large antiretroviral therapy program in Nigeria: a longitudinal analysis for risk factors. oleh Man Charurat, Modupe Oyegunle, Renata Benjamin, Abdulrazaq Habib, Emeka Eze, Prince Ele, Iquo Ibanga, Samuel Ajayi, Maria Eng, Prosanta Mondal, Usman Gebi, Emilia Iwu, Mary-Ann Etiebet, Alash'le Abimiku, Patrick Dakum, John Farley, William Blattner