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Journal
Lancet
Volume
351
Issue
9100
Pages
399–403.
Publication year
1998
Suggested citation
Ortqvist A, Hedlund J, Burman LA, Elbel E, Höfer M, Leinonen M, Lindblad I, Sundelöf B, Kalin M. Randomised trial of 23-valent pneumococcal capsular polysaccharide vaccine in prevention of pneumonia in middle-aged and elderly people. Swedish Pneumococcal Vaccination Study Group. Lancet. 1998; 351(9100): 399–403.