... have influenced results adversely. For a number of reasons, one of which is the influence of the training programme of NTI, the findings of this study should be considered illustrative of methodology ... adversely affected by transfer of trained personnel and their replacement by untrained ones, inadequate supply of stains and other requirements, and quality of supplies particularly stains and slides. ... only in 2 centres and over-diagnosis in one, indicating the need for supervision and corrective training. Comparisons of results on re-examination of centre smears and duplicate smears, indicated...