Metastatic Cancer Drug Market Forecast to 2028 - COVID-19 Impact and Global Analysis By Cancer Type (Breast Cancer, Lung Cancer, Liver Cancer, Hematological Cancer, Brain Cancer, Prostate Cancer, Pancreatic Cancer, and Others), Route of Administration (Intravenous, Intramuscular, Oral, and Others), Drug Class (HER2 Inhibitor, Immune Checkpoint Inhibitor, PARP Inhibitor, Kinase Inhibitor, and Other