All these "discoveries" suffer from the problem of inconclusive data. As mentioned in another comment, this can be the result of data that is skewed somehow, fo

All these "discoveries" suffer from the problem of inconclusive data. As mentioned in another comment, this can be the result of data that is skewed somehow, for example by neighborhood, by the selection of patients, by the technology used, etc. Validating these results is not an easy task, especially when one talks about healthcare data.