Serapion of Alexandria, and Philinus of Cos, are regarded as the founders of this school in the 3rd century BC.
The sect survived a long time, as Marcellus lived in the 4th century AD.
The doctrines of this school are described by Aulus Cornelius Celsus in the introduction to his De Medicina.
This and other instances occurring daily were observed by people diligent enough to realize which method was best to cure particular conditions, and hence the art of medicine arose.
Initially there was a necessity to examine remedies with the greatest accuracy, but now they are sufficiently ascertained; there are no new diseases, and hence no need for any novel methods of healing.