 They too, were not immediately able to pinpoint the cause of the sicknesses, so they sent samples to the New York State Food Laboratory, a part of the federally funded Food Emergency Response Network.On 23 March, the New York State Food Laboratory reported that aminopterin was found in samples sent to them by Cornell.Michigan State University also investigated the source of the kidney failure and made available to researchers and veterinarians pictures and photographs of affected animal kidneys "demonstrating acute tubular necrosis in the kidney with intratubular crystals."