[1] The Times, London, England
[2] Univ Oxford, Ctr Clin Vaccinol & Trop Med, Churchill Hosp, Oxford, England
[3] Food & Drug Board, Accra, Ghana
[4] Natl Agcy Food & Drug Adm & Control, Lagos, Nigeria
[5] Mahidol Univ, Fac Trop Med, Bangkok, Thailand
[6] Univ Oxford, Churchill Hosp, Ctr Clin Vaccinol & Trop Med, Oxford, England