=====William Stewart Halsted=====
It was [[William Stewart Halsted]] in the early twentieth century who introduced the format of a [[residency]] program to [[USA]] as a tool to improve clinical practice. As a surgeon teaching at Johns Hopkins Medical School in [[Baltimore]], his aim was to guarantee a well-organized training period for young medical doctors to finally become qualified surgeons—and this model is still considered the standard for education in any medical specialization
((Long DM. Educating neurosurgeons for the 21st century. Neurosurg Q. 1996;62(2):78–88.)).