Benjamin SC Uzochukwu, Lausdeus O Chiegboka, Chibuike Enwereuzo, Usonwanne Nwosu , David Okorafor, Obinna E Onwujekwe, Nkoli P Uguru, Florence T Sibeudu, Ogochukwu P Ezeoke
BMC Public Health. 2010; 10: 486. Published online 2010 August 16. doi: 10.1186/1471-2458-10-486