24.6 university of maryland medical system , baltimore 108 77.7 175 20.8 21.3 johns hopkins hospital , baltimore 340 76.6 469 23.3 19.8 beth israel hospital , massachusetts 101 82.2 214 2.6 4.7 beth israel deaconess medical center , boston 177 63.9 208 34.7 33.1 university of massachusetts medical center