Per patient the therapist indicates the dominant clinical pattern based on his/her experience. Prior to the data analysis, the researchers will be blinded to the patient identification data. Subsequent, the registration forms will be screened for the presence of clinical criteria (obtained from previous Delphi study), independent of the therapist's diagnosis/conclusions. A second independent researcher will gather this information, which will be used for statistical analysis, in order to investigate which clinical criteria can be considered as determinative for a particular pattern. Outcome measures for these analysis are: