Reporting from Washington - When your doctor writes you a prescription, that's just between you, your doctor and maybe your health insurance company -- right? Wrong. As things stand now, the pharmaceutical companies that make those prescription drugs are looking over the doctor's shoulder to keep track of how many prescriptions for each drug the physician is writing. By obtaining data from pharmacies and health insurers, the drug companies learn the prescribing habits of thousands of doctors. That information has become not just a powerful sales and marketing tool for the pharmaceutical industry but also a source of growing concern...