Luis Vargas Fernandez, Chilean physiologist and diabetologist (10 June 1912- 29 September 2011)

Authored 190 papers and 4 books

Demonstrated that subcutaneous implants of zinc-insulin protamine presented a better glycemic control 

Developed a method for measuring stimulating hormone of melanocytes

With Randle and Taylor described human serum transferrin a plasmatic antagonist of insulin and mediating agent of growth hormone (1960)  

With C.H. Faermann P. and P.A. Karplus patented the utilization of human serum transferrin for control of insulin levels US5849293 (1998)