Associations Between Chemotherapy-Induced Nausea in Patients With Genitourinary, Sarcoma or Melanoma Cancers and Changes in Gut Microbiome: Potential for Precision Therapeutics

"Patients will collect stool for microbiome analysis at baseline (i.e., 3 +2 days prior to chemotherapy) and again 5-7 days following initiation of chemotherapy.~Blood samples will be collected prior to their first chemotherapy treatment, and in the second week after chemotherapy."