Nicholas Alders (1904-1995) was a Hungarian born, Austrian trained, English naturalised obstetrician, gynaecologist and surgeon. Remembered for his description of Alders sign (1951)
Rovsing sign (1907): In acute appendicitis, palpation of the left lower quadrant may elicit pain in the right lower quadrant. Niels Rovsing and Emil S Perman (1904)