Columbia subject headings:
Nervous system--Surgery--Periodicals.
Neurology--Periodicals.
Orthopedic surgery--Periodicals.
Orthopedics--Periodicals.
Harvard subject headings:
Nervous system--Surgery--Periodicals.
Neurology--Periodicals
Orthopedic surgery--Periodicals.
Orthopedics--Periodicals
Princeton subject headings: