42 MEDICAL CARE, BIOLOGICAL RESEARCH, CLINICAL MEDICAL RESEARCH, NAMELY MANAGEMENT OF TREATMENT OF PATIENTS UNDERGOING CHEMOTHERAPY; MEDICAL DIAGNOSTIC SERVICES IN THE AREA OF DISEASES; MEDICAL SERVICES, NAMELY, MANAGEMENT OF TREATMENT OF PATIENTS UNDERGOING CHEMOTHERAPY; THERAPEUTIC DRUG RESEARCH FOR OTHERS, NAMELY, MEASURING, SCREENING, AND TESTING THE EFFECTS AND AMOUNTS OF THERAPEUTIC DRUGS; LABORATORY TESTING OF DRUG LEVELS IN BIOLOGICAL SAMPLES; LABORATORY SERVICES FOR TESTING BIOLOGICAL SAMPLES IN CONNECTION WITH THE DIAGNOSIS OF DISEASE AND FOR MAKING THERAPY DECISIONS