Author
Sage Journals Online
35
ScienceDirect (Online service)
35
BioMed Central Ltd
27
International Scholarly Research Network
10
Libertas Academica
10
Hindawi Publishing Corporation
8
EBSCO Publishing (Firm)
5
LINK (Online service)
5
British Medical Association
4
Molecular Diversity Preservation International
4
National Center for Health Statistics (U.S.)
4
Wiley InterScience (Online service)
4
American Medical Association
3
California Medical Association
3
German Medical Science (Organization)
3
International Union of Pharmacology
3
National Institutes of Health (U.S.). PubMed Central
3
Portico (Organization)
3
Sage Publications
3
Taylor & Francis Online
3
United States. Public Health Service
3
World Health Organization
3
American Association of Neurological Surgeons
2
American College of Nurse-Midwives
2
American College of Physicians
2
American College of Surgeons
2
American Diabetes Association
2
American Psychiatric Association
2
American Public Health Association
2
American Therapeutic Society
2
Association of Military Surgeons of the United States
2
Association of Pediatric Oncology Nurses (U.S.)
2
Biological Engineering Society
2
Dove Medical Press Ltd
2
European Board for Accreditation in Cardiology
2
European Society of Human Genetics
2
Illinois State Medical Society
2
International Epidemiological Association
2
International Society for Antiviral Research
2
Johns Hopkins University. School of Hygiene and Public Health
2
National Institute of Environmental Health Sciences
2
National Institutes of Health (U.S.)
2
Nordic Respiratory Academy
2
ProQuest Information and Learning Company
2
Public Library of Science
2
Sheridan PubFactory
2
Society of Teachers of Family Medicine
2
Société belge de neurologie
2
Swets & Zeitlinger
2
Synergy (Online service)
2
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