By Bernd Debusmann JrBBC News, WashingtonGetty ImagesDr Ruth Gottesman studied learning disabilities and developed screening protocols at Albert Einstein College of Medicine.in the Bronx.A New York City medical school will offer students free tuition following a $1bn donation from the 93-year-old widow of a major Wall Street investor. The gift to Albert Einstein College of Medicine came from Dr Ruth Gottesman, a former professor at the Bronx school. It is one of the largest ever donations made t...