In April 2006, "Science" published a comment authored by Wahl and collaborators, asserting errors in the 2004 paper, stating that "their conclusion was based on incorrect implementation of the reconstruction procedure" a mistake with Repercussions; and a disputing VS Reply. In this reply, VS and his team demonstrated that caveats raised in the Wahl comment did not invalidate their original conclusion. The inadequacy of the MBH98 methodology for climate reconstructions was later independently confirmed in other publications, for instance by Lee, Zwiers and Tsao, 2008 or by Christiansen et al., 2009.