# NOT RUN {
data(vfseries)
progression(vfseries)
progression(vfseries[vfseries$eyeid == 1,])
progression(vfseries[vfseries$eyeid == 2,])
progression(vfseries, method=c("cigts"))
progression.cigts(vfseries)
progression(vfseries, method=c('plr.nouri.2012', 'schell2014', 'vfi'))
# }
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