Identification of risk factors associated with carriage of resistant Escherichia coli in three culturally diverse ethnic groups in Tanzania: a biological and socioeconomic analysis oleh Mark A Caudell, PhD, Colette Mair, PhD, Murugan Subbiah, PhD, Louise Matthews, ProfPhD, Robert J Quinlan, ProfPhD, Marsha B Quinlan, PhD, Ruth Zadoks, ProfPhD, Julius Keyyu, PhD, Douglas R Call, ProfPhD