Subfield
- Oncology6
- Ophthalmology6
- Oral Surgery1
- Organic Chemistry2
- Organizational Behavior and Human Resource Management10
- Orthopedics and Sports Medicine6
- Otorhinolaryngology1
- Parasitology70
- Pathology and Forensic Medicine3
- Pediatrics, Perinatology and Child Health53
- Periodontics1
- Pharmacology10
- Pharmacy9
- Philosophy2
- Physical Therapy, Sports Therapy and Rehabilitation24
- Physical and Theoretical Chemistry1
- Physiology5
- Plant Science34
- Political Science and International Relations127
- Pollution40