[1] Inst Pasteur, Dept Virol, Unite Epidemiol &Phsyiopathol Virus Oncogenes, F-75724 Paris 15, France
[2] Inst Pasteur Nouvelle Caledonie, Noumea, New Caledonia
[3] Inst Pasteur, Unite Rech & Expertise Histotechnol & Pathol, Paris, France
[4] Hosp Sia, Wallis, Wallis Futuna, France