Evaluating diabetes care in primary healthcare centers in Abuja, Nigeria: a cross-sectional formative assessment oleh Ikechukwu A. Orji, Abigail S. Baldridge, Mercy U. Ikechukwu-Orji, Bolanle Banigbe, Nelson C. Eze, Aashima Chopra, Kasarachi Omitiran, Guhan Iyer, Deborah Odoh, Morenike Alex-Okoh, Rifkatu Reng, Lisa R. Hirschhorn, Mark D. Huffman, Dike B. Ojji