wtccc.sample.list(infile)
AFFYID RSID pos AlleleA AlleleB 12999A2_A 12999A2_B ...
The first 5 fields are discarded. There after, every other token
is retained, with the "_A" or "_B" part removed to give the sample list.
See also read.wtccc.signals
for more details.
read.wtccc.signals