http://www.nejm.org/doi/full/10.1056/NEJMhpr1405667 report http://www.nejm.org/doi/full/10.1056/NEJMhpr1405667 report http://www.nejm.org/doi/full/10.1056/NEJMhpr1405667 http://www.nejm.org/doi/full/10.1056/NEJMhpr1405667 reported in July http://www.nejm.org/doi/full/10.1056/NEJMhpr1405667 http://www.nejm.org/doi/full/10.1056/NEJMhpr1405667 20 Million people http://www.nejm.org/doi/full/10.1056/NEJMhpr1405667 NEJM article http://www.nejm.org/doi/full/10.1056/NEJMhpr1405667 NEJM article new coverage provisions