German doctor Merlin and Russian Minkowski collaborated on digestive function. They found that in the experimental dog group, the dog's pancreas was removed. The urine of such dogs always attracted swarms of bees. It contains a lot of sugar, so scientists speculate that the pancreas may be related to diabetes. What strongly supports the above conclusions is. ['Doctors use insulin to control diabetes.', 'The pancreas has a digestive function.', 'Pancreatic sugar synthesis.', 'Patients with pancreatic cancer can aggravate diabetes.']