RT Journal Article SR Electronic(1) A1 Twisselmann, B YR 2001 T1 Influenza A (H5N1) virus in poultry in Hong Kong JF Weekly releases (1997–2007) VO 5 IS 21 SP 1748 OP DO https://doi.org/10.2807/esw.05.21.01748-en UL https://www.eurosurveillance.org/content/10.2807/esw.05.21.01748-en