Advocates for patients with liver disease are trying to pull HHS Secretary Sylvia Burwell into the debate over coverage of high-cost specialty drugs by asking her to convene a meeting among drug makers, plans, patients and providers to figure out how to make Sovaldi available to everyone infected with hepatitis C. Separately, the Campaign for Sustainable Rx Pricing, which represents plans and other stakeholders such as hospitals, has been trying to convene a meeting to negotiate down the price of...