RT Journal Article SR Electronic(1) A1 Handysides, S YR 1998 T1 From the editors. Chickens and eggs: time for a different approach? JF Weekly releases (1997–2007) VO 2 IS 31 SP 1177 OP DO https://doi.org/10.2807/esw.02.31.01177-en UL https://www.eurosurveillance.org/content/10.2807/esw.02.31.01177-en