(ICD-10) (9). Converting diagnostic criteria into diagnostic algorithms incorporated in the assessment instruments was useful in uncovering inconsistencies, ambiguities and overlap and allowing their removal. The work on refining the ICD-10 also helped to shape the assessment instruments. The final result was a clear set of criteria for ICD-10 and assessment instruments which can produce data necessary for the classification of disorders according to the criteria included in Chapter V(F) of ICD-10.
Many individuals and organizations have contributed to the production of the classification of mental and behavioural disorders in ICD-10 and to the development of the texts that accompany it. The field trials of the ICD-10 proposals, for example, involved researchers and clinicians in some 40 countries; it is clearly impossible to present a complete list of all those who participated in this effort. What follows is a mention of individuals and agencies whose contributions were central to the creation of the documents composing the ICD-10 family of classifications and guidelines.