MiCK assay has been proven to have clinical usefulness in two studies. In one study using multiple types of cancer, physicians used the MiCK assay in 63% of the patients. If the physician used the results to prescribe the chemotherapy treatment, the patients' response rate, time to the disease getting worse, and overall survival were all significantly better compared to patients whose physicians did not use the results. In another study of breast cancer patients, physicians used the MiCK assay in 74% of patients. If the results were used when planning chemotherapy, response rate and time to the disease started getting worse were all significantly better compared to patients whose physicians did not use the results of the MiCK assay The purpose of this study is to compare the outcomes of patients who have had the MiCK assay (CorrectChemo) with tumor types, physician attitudes towards the test, and how the physicians used the test. This study will be gathering this data by reviewing medical charts.