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- astrophysics139
- astrophysics - astrophysics of galaxies94
- astrophysics - solar and stellar astrophysics76
- astrophysics - earth and planetary astrophysics56
- astrophysics - instrumentation and methods for astrophysics44
- hiv infections42
- aids dementia complex26
- astrophysics - high energy astrophysical phenomena26
- acquired immunodeficiency syndrome23