1. Adami J, Gabel H, Lindelof, Ekstrom K, Rydh B, Glimelius B, Ekbom A, Adami H-O and Granath F . (2003). Br. J. Cancer, 89, 1221–1227.
2. Alexander FE, Boyle P, Carli PM, Coebergh JW, Ekbom A, Levi F, McKinney PA, McWhirter W, Michaelis J, Peris-Bonet R, Petridou E, Pompe-Kirn V, Plesko I, Pukkala E, Rahu M, Stiller CA, Storm H, Terracini B, Vatten L and Wray N . (1999). Eur. J. Cancer, 35, 439–444.
3. Alexander FE, Chan LC, Lam TH, Yuen P, Leung NK, Ha SY, Yuen HL, Li CK, Li CK, Lau YL and Greaves MF . (1997). Br. J. Cancer, 75, 457–763.
4. Beasley RP and Hwang L-Y . (1991). Viral Hepatitis and Liver Disease. Hollonger FB, Lemon SM and Margolis HS (eds). Williams and Wilkins: Baltimore, pp. 532–535.
5. Beasley RP, Hwang L-Y, Lin CC and Chien CS . (1981). Lancet, 2, 1129–1133.