Researchers at Harvard and Brown universities are analyzing state Medicaid programs' coverage restrictions for the expensive hepatitis C drug Sovaldi, and the findings could lay the groundwork for beneficiaries to sue states, although a Harvard law instructor said legal action is a last resort. Patient advocates are especially angry at states that refuse to give the hepatitis C drug to alcoholics and drug addicts, arguing the policy is discriminatory and has no medical basis. Malinda Ellwood, clinical instructor of law...