Fig. 1: STROBE flow-chart.
From: Clinical, pathological, and PAM50 gene expression features of HER2-low breast cancer

Flow-chart resuming the patient selection process, showing causes for exclusion and the number of patients with available data for the main analyses presented in the study. GEICAM Grupo Español de Investigación en Cáncer de Mama, CIBOMA Coalición Iberoamericana de Investigación en Oncología Mamaria, VHIO Vall d’Hebron Institute of Oncology, SOLTI Solid Tumor Intensification Group, IHC immunohistochemistry, ISH in-situ hybridization, HR hormone receptors.