“…However, the nature of the association between viral infection and RS was not well understood. The sporadic occurrence of RS in a community in which viral infection is widespread made some authors believe that viral infection in itself was not sucient to explain the syndrome and that additional cofactors such as a¯atoxin [70] or salicylates [31,33,42,45,46,51,52,82,86] seem to be necessary. However, this hypothesis has to be challenged.…”