There are 3,754 titles available from PubMed Central Free
- Annals of Neurosciences (ISSN: 0972-7531,EISSN: 0976-3260)
- Annals of Noninvasive Electrocardiology (ISSN: 1082-720X,EISSN: 1542-474X)
- Annals of Nuclear Cardiology (ISSN: 2189-3926,EISSN: 2424-1741)
- Annals of Occupational and Environmental Medicine (EISSN: 2052-4374)
- Annals of Pediatric Cardiology (ISSN: 0974-2069,EISSN: 0974-5149)
- Annals of Pediatric Endocrinology & Metabolism (ISSN: 2287-1012,EISSN: 2287-1292)
- Annals of Rehabilitation Medicine (ISSN: 2234-0645,EISSN: 2234-0653)
- Annals of Saudi Medicine (ISSN: 0256-4947,EISSN: 0975-4466)
- Annals of Surgery (ISSN: 0003-4932,EISSN: 1528-1140)
- Annals of Surgery Open (ISSN: 2691-3593)
- Annals of Surgical Innovation and Research (EISSN: 1750-1164)
- Annals of Surgical Treatment and Research (ISSN: 2288-6575,EISSN: 2288-6796)
- Annals of the Rheumatic Diseases (ISSN: 0003-4967,EISSN: 1468-2060)
- Annals of the Royal College of Surgeons of England (ISSN: 0035-8843,EISSN: 1478-7083)
- Annals of Thoracic and Cardiovascular Surgery (ISSN: 1341-1098,EISSN: 2186-1005)
- Annals of Thoracic Medicine (ISSN: 1817-1737,EISSN: 1998-3557)
- Annals of Translational Medicine (ISSN: 2305-5839,EISSN: 2305-5847)
- Annals of Transplantation (ISSN: 1425-9524,EISSN: 2329-0358)
- Annals of tropical medicine and parasitology (ISSN: 0003-4983,EISSN: 1364-8594)
- Annals of Vascular Diseases (ISSN: 1881-641X,EISSN: 1881-6428)
- Annual Meeting of the American Climatological Association
- Annual proceedings - Association for the Advancement of Automotive Medicine (ISSN: 1540-0360)
- Antibiotics-Basel (ISSN: 2079-6382)
- Antibodies (ISSN: 2073-4468)
- Antibody Therapeutics (EISSN: 2516-4236)
- Antimicrobial Agents and Chemotherapy (ISSN: 0066-4804,EISSN: 1098-6596)
- Antimicrobial Resistance and Infection Control (EISSN: 2047-2994)
- Antimicrobial Stewardship & Healthcare Epidemiology (EISSN: 2732-494X)
- Antioxidants (ISSN: 2076-3921)
- Antiviral Chemistry & Chemotherapy (ISSN: 0956-3202,EISSN: 2040-2066)
- Aob Plants (ISSN: 2041-2851)
- Aorta (ISSN: 2325-4637)
- Apl Bioengineering (ISSN: 2473-2877)
- Application of Clinical Genetics (ISSN: 1178-704X)
- Applications in Plant Sciences (ISSN: 2168-0450)
- Applied & Translational Genomics (ISSN: 2212-0661)
- Applied and Environmental Microbiology (ISSN: 0099-2240,EISSN: 1098-5336)
- Applied Bionics and Biomechanics (ISSN: 1176-2322,EISSN: 1754-2103)
- Applied Biosafety (ISSN: 1535-6760,EISSN: 2470-1246)
- Applied Clinical Informatics (ISSN: 1869-0327)
- Applied microbiology (ISSN: 0003-6919)
- Applied microscopy (ISSN: 2287-5123)
- Applied Psychological Measurement (ISSN: 0146-6216,EISSN: 1552-3497)
- APSP Journal of Case Reports (ISSN: 2218-8185)
- Aquaculture Nutrition (ISSN: 1353-5773,EISSN: 1365-2095)
- Aquatic Biosystems (EISSN: 2046-9063)
- Arab Journal of Urology (ISSN: 2090-598X,EISSN: 2090-5998)
- The Arabidopsis Book (ISSN: 1543-8120)
- Archaea-An International Microbiological Journal (ISSN: 1472-3646,EISSN: 1472-3654)
- Archive of Clinical Cases (ISSN: 2360-6975)