Before revision:  We prove here that, many years later, Data Leakage can still be a non negligible overfitting source in deep learning models for digital pathology due to (i) the presence of multiple images for each subject in histology collections;
After revision:  We prove here that, many years later, Data Leakage can still be a non-negligible overfitting source in deep learning models for digital pathology due to (i) the presence of multiple images for each subject in histology collections;