Trends in childhood pneumococcal vaccine coverage in Shanghai, China, 2005–2011: a retrospective cohort study
Crossref DOI link:
Update policy: https://doi.org/10.1007/SPRINGER_CROSSMARK_POLICY
Boulton, Matthew L.
Ravi, Nithin S.
Wagner, Abram L.
Funding for this research was provided by:
University of Michigan Office of Global Public Health