80-lecie fenyloketonurii. Część IV: Stanisław F. Śnieszko i Ada J. Susi a historia opracowania testu Guthriego

Using the same bacteria and technique applied in bacterial inhibition assays to screen for different antimetabolites in cancer patients, Guthrie and his lab technician, Ada Susi (1918-2002), who was born and educated in Estonia, developed a simple and cheap test for phenylalanine in whole blood dried on filter paper.