28 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 26 27 28 29 30 31 1 2 3 4 9 16 3,000,000 2,000,000 1,000,000 100% 90% 80% 70% 60% 50% 40% 95.000 90000 85000 80000 75000 70000 65000 60000 55000 50000 45000 40000 35000 20000 25000 20000 15000 10000 5000 The Boston medical and surgical journal Massachusetts Medical Society, New |