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

• MRC Unit the Gambia (GM)

كما طُبع: Baleng M. Wutor

• MRC Unit the Gambia (GM)

كما طُبع: Williams Adefila

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

• MRC Unit the Gambia (GM)

كما طُبع: Yusuf A. Olawale

• MRC Unit the Gambia (GM)

كما طُبع: 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)

كما طُبع: Minteh Molfa

• MRC Unit the Gambia (GM)

كما طُبع: Rasheed Salaudeen

• MRC Unit the Gambia (GM)

كما طُبع: Grant A. Mackenzie