If you could test to determine the cause of a person’s diabetes, wouldn’t you do it? If you could get at the root of a person’s atherosclerosis, wouldn’t you test for that as well? If you could take a test sample to diagnose the type of kidney disease, wouldn’t you do it? Hypertension? Ulcers? Pneumonia? Peripheral vascular disease? Rheumatoid arthritis? Crohn’s disease? Acne? Anorexia? Asthma? Bipolar disorder? Breast cancer? Epilepsy? Myocardial infarction? Headache? Of course you would...