Paclitaxel Therapeutic Drug Monitoring in Cancer Patients

Primary Objective: • Determine the feasibility of monitoring paclitaxel serum drug levels in patients with a solid tumor (e.g. lung, breast, and gynecologic cancers) for which Paclitaxel is the standard of care. Secondary Objectives: * Compare Paclitaxel serum drug levels among patients with differing degrees of chemotherapy-induced peripheral neuropathy at the end of Paclitaxel treatment. * Compare mitochondrial function within circulating peripheral blood mononuclear cells among patients with differing degrees of chemotherapy-induced peripheral neuropathy at the end of Paclitaxel treatment. * Compare the ability of pulsed electromagnetic field to modulate immune cells of individuals experiencing differing degrees of chemotherapy-induced peripheral neuropathy at the end of Paclitaxel treatment.