Figure 1From: External Quality Assessment (EQA) program for the preanalytical and analytical immunohistochemical determination of HER2 in breast cancer: an experience on a regional scaleWorkflow of the EQA program. A. EQA HER2 immunostaining: specimens were selected and sent by the Coordinating Center (CC) to the 16 PCs. B. EQA HER2 interpretation: specimens were selected and sent by the CC to the 16 PCs grouped into 3 sets.Back to article page