Alexander Monro secundus (1733-1817) was a Scottish physician and anatomist. Most notable contributions include works on the lymphatic system, the interventricular foramen (of Monro), and the Monro-Kellie doctrine
Sir James Mackenzie (1853-1925) was a Scottish cardiologist and General Practitioner. Mackenzie was a pioneer in the study of cardiac arrhythmias known as the father of British cardiology
Alfred Jean Fournier (1832-1914) was a French Dermatovereologist specialising in congenital syphillis, stressing the importance of syphilis as a cause of degenerative diseases and parasyphilitic conditions.
George Kellie (1770 – 1829) was a Scottish surgeon. Together with Alexander Monro secundus gave his name to the Monro-Kellie doctrine
The Monro-Kellie doctrine or hypothesis states that the sum of volumes of brain, cerebrospinal fluid (CSF) and intracerebral blood is constant. An increase in one should cause a reciprocal decrease in either one or both of the remaining two.