> -gltLabel 1 'wk6Mwk0_int -gltCode 1 'cond : 1*tms -1*sham time : 1*wk6 -1*wk0'
This specification assesses the difference between
wk6 - wk0 under the condition tms
and
wk6 - wk0 under the condition sham
Or the difference between
tms - sham at time wk6
and
tms - sham at time wk0
Gang