Antioquia University's Neurobanco coordinator, Colombian doctor Carlos Villegas (out of frame), holds a frozen brain at the laboratory in Medellin, Antioquia department, Colombia on December 2, 2014. Neurobanco, the only brain bank in the country, is a mainstay for global research on brain diseases, with a donation of 234 brains stored at -80 °C, many of which belonged to Alzheimer patients. AFP PHOTO/RAUL ARBOLEDA
Foto: AFP - RAUL ARBOLEDA