- Neurology 5
- Neuroradiology 5
- Neurosurgery 5
- Interventional Radiology 3
- Minimally Invasive Surgery 3
- Surgical Orthopedics 3
- Classical and Quantum Gravitation, Relativity Theory 2
- Elementary Particles, Quantum Field Theory 2
- Particle and Nuclear Physics 2
- Psychiatry 2
- Quantum Field Theories, String Theory 2
- Quantum Physics 2
- User Interfaces and Human Computer Interaction 2
- Computational Intelligence 1
- Computer Appl. in Social and Behavioral Sciences 1
- Computer Applications 1
- Computer Communication Networks 1
- Database Management 1
- Engineering Design 1
- Information Systems Applications (incl. Internet) 1