Characteristics and risk factors of preterm births in a tertiary center in Lagos, Nigeria oleh Azeez Butali, Chinyere Ezeaka, Osayame Ekhaguere, Nancy Weathers, Jenna Ladd, Iretiola Fajolu, Christopher Esezobor, Christian Makwe, Bukola Odusanya, Rose Anorlu, Wasiu Adeyemo, Edna Iroha, Mathias Egri-Okwaji, Prisca Adejumo, Lawal Oyeneyin, Moses Abiodun, Bolaji Badejoko, Kelli Ryckman