Standardized study performance, quality assurance, and quality control in a cluster-randomized trial: the Pneumococcal Vaccine Schedules trial

• MRC Unit the Gambia (GM)

as printed: Baleng M. Wutor

• MRC Unit the Gambia (GM)

as printed: Williams Adefila

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

as printed: Yusuf A. Olawale

• MRC Unit the Gambia (GM)

as printed: Keita M. Lamin

• Ministry of Health and Social Welfare (GM)

• Ministry of Health and Social Welfare (GM)

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

as printed: Minteh Molfa

• MRC Unit the Gambia (GM)

as printed: Rasheed Salaudeen

• MRC Unit the Gambia (GM)

as printed: Grant A. Mackenzie