Surgery 8 methods 3 surgery 3 44.42 pharmacy, pharmaceuticals 2 Child 2 Children 2 Endoscopy 2 Infant 2 Nervous System Diseases 2 Neurosurgery 2 Neurosurgical Procedures 2 Plants 2 Research 2 Skull Base 2 Skull base 2 pathology 2 35.50 organic chemistry: general 1 42.15 cytology, cell biology and cell physiology 1 42.40 botany: general 1 42.42 plant physiology 1 44.51 medical diagnostic 1 44.90 neurology 1 Adolescent 1 Algology 1 Allergie 1 Allergy and Immunology 1 Angewandte Mathematik 1 Biochemie 1 Biochemistry 1 Biological Factors 1