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mapping_datadictionary
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This file contains information regarding each column of the mapping file

Column Name                                  Column description
-------------                                -------------------
Sample                                       Unique identifier for each tree at each time point
Timepoint                                    When the sample was collected in weeks post-grafting
CRF.No                                       Random number used to identify trees
Tree.ID                                      Alpha-numeric identifier for each tree
Tree.Graft                                   What type of graft the tree received. Two levels 
                                                CLas.Neg: Tree received grafts originating from uninfected (CLas-negative, control) trees
                                                CLas.Pos: Tree recieved grafts originating from infected (CLas-positive) trees
Analysis.use                                 Whether the sample was used in statistical analyses and data interpretation