Figure 1. Histogram representing the complete dataset from mid 1998 to mid 2000, showing all of the participants in the study and their yearly extremity dose exposure. N1, Nurse 1; C, control; N2, Nurse 2; R1, Radiographer 1;RAD1, Radiologist 1; R2, Radiographer 2; R3, Radiographer 3; RAD2,Radiologist 2.