Impact of the COVID-19 pandemic on a clinical trial of pneumococcal vaccine scheduling (PVS) in rural Gambia by Ilias Hossain, Isaac Osei, Galega Lobga, Baleng M. Wutor, Yekini Olatunji, Williams Adefila, Banjo Adeshola, Yasir Isa, Cattram Nguyen, Kemo Sonko, Lamin Ceesay, Bubacarr Baldeh, Omar Barrow, Benjamin Young, Saidina Ceesay, Abdoullah Nyassi, Golam Sarwar, Ousman Barjo, Momodou M.Drammeh, Rasheed Salaudeen, Grant Mackenzie

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Standardized study performance, quality assurance, and quality control in a cluster-randomized trial: the Pneumococcal Vaccine Schedules trial by Isaac Osei, Benjamin Young, Golam Sarwar, Yekini A. Olatunji, Ilias Hossain, Babila G. Lobga, Baleng M. Wutor, Williams Adefila, Emmanuel Mendy, Banjo Adeshola, Yasir Shitu Isa, Yusuf A. Olawale, Keita M. Lamin, Ebrimah Nyimanta, Bubacarr Baldeh, Abdoullah Nyassi, Momodou M. Drammeh, Barjo Ousman, Minteh Molfa, Rasheed Salaudeen, Grant A. Mackenzie

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