Resolving the Pneumococcal Vaccine Controversy: Are There Alternatives to Randomized Clinical Trials?
Clemens J, Shapiro E. Resolving the Pneumococcal Vaccine Controversy: Are There Alternatives to Randomized Clinical Trials? Clinical Infectious Diseases 1984, 6: 589-600. PMID: 6390636, DOI: 10.1093/clinids/6.5.589.Peer-Reviewed Original Research