Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:05).
by guest on O ctober 6, 2016
http://brain.oxfordjournals.org/ D ow nloaded from
both KCNQ and Kir2 potassium currents (Galarraga et al., 1999;
Shen et al., 2005, 2007), thereby favouring LTP induction
(Calabresi et al., 2000; Bonsi et al., 2008).
Category: