Aspects of this topic are discussed in the following places at Britannica.
The major medical specialties involving surgery are general surgery, plastic surgery, orthopedic surgery, obstetrics and gynecology, neurosurgery, thoracic surgery, colon and rectal surgery, otolaryngology, ophthalmology, and urology. General surgery is the parent specialty and now centres on operations involving the stomach, intestines, breast, blood vessels in the extremities, endocrine...
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