You will be given a definition of a task first, then some input of the task.
In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

(CNN) The case of college football player Michael Keck has added more fuel to the fire about whether young children should play football. Despite the fact that Keck, 25, never played professional football, he was diagnosed with chronic traumatic encephalopathy, the Alzheimer's-like disease that also claimed the likes of former Chicago Bears safety Dave Duerson and former San Diego Chargers linebacker Junior Seau, and with equal severity. "I was surprised how extensive it was," said Dr. Ann McKee, professor of neurology and pathology at Boston University. She and her team have evaluated 170 brains to understand the pathology of CTE. The telltale sign of the disease is tangles of the protein tau, which takes over parts of the brain. They result from repeated hits to the head.Chronic traumatic encephalopathy results from repetitive hits to the headThe disease has symptoms that are similar to Alzheimer's44 of 55 college football players were found to have CTE 
 Question:"He was like, 'You know, no one believes I have this disease,' but he believed he did and I believed him and so he told me, he's like, 'If I ever die, I want my brain donated to _,' " said Cassandra.
Output:
Boston University