Original sentence: ) in the paper that brought him the Nobel, Paulescu already held a patent for his discovery (April 10, 1922, patent no.Some mantain that Nicolae Paulescu, a Romanian professor of physiology at the University of Medicine and Pharmacy in Bucharest, was the first to isolate insulin, in 1916, altough his pancrein was a impure aqueos extract unfit for human treatment similar to the one used previosly by Israel Kleiner
Edited sentence: By the time Banting also isolated insulin after reading and citing Paulescu's published work ("Research on the Role of the Pancreas in Food Assimilation",) in the paper that brought him the Nobel, Paulescu already held a patent for his discovery (April 10, 1922, patent no.Moreover, Nicolae Paulescu, a Romanian professor of physiology at the University of Medicine and Pharmacy in Bucharest, was the first to isolate insulin, in 1916, which he called at that time, pancrein