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Author/Creator
- SpringerLink (Online service)52
- ebrary, Inc28
- National Center for Health Statistics (U.S.)24
- Society of Photo-Optical Instrumentation Engineers17
- Osler, William, Sir, 1849-191911
- McGraw-Hill Education LLC. publisher10
- World Health Organization10
- Lippincott Williams & Wilkins9
- Centers for Disease Control and Prevention (U.S.)8
- National Hospital Discharge Survey (U.S.)8
- Project Muse8
- SPIE Digital Library8
- Graves, Edmund7
- Shindler, Daniel M.7
- Dougherty, Thomas J. (Thomas John), 1933-6
- Ovid Technologies, Inc6
- ProQuest (Firm)6
- Stearns, S. C. (Stephen C.), 1946-6
- Crowley, Leonard V., 1926-5
- Draper, George, 1880-5