Tom Williams/Trop Med Int Health

Epidemiological studies of the 'non-specific effects' of vaccines: I--data collection in observational studies.Fine, P. E. Williams, T. N. Aaby, P. Kallander, K. Moulton, L. H. Flanagan, K. L. Smith, P. G. Benn, C. S. Working Group on Non-specific Effects of, Vaccines
Trop Med Int Health, (2009). 14:969-76