Blackmore               Exercise Histories of Eating-Disordered and
                        Control Subjects
PreviousDate            Find Previous Test Date for Subject
PreviousResult          Find Previous Test Result for Subject
Transition-package      Characterise Transitions in Test Result Status
                        in Longitudinal Studies
Transitions             Identify Temporal Transitions in Longitudinal
                        Study Data
uniques                 Unique Values for Subject, Timepoint and Result
