In Norway there exists two doctoral degrees: the normal PhD degree and the degree of Dr. Philos. (doctor philosophiae). The last mentioned, the Dr.Philos. degree in Norway may be conferred on graduates who have qualified for a doctoral degree on their own, without formal research training. The candidates write the thesis without supervision, and have no connection with the university as a doctoral candidate until a faculty has approved their application for admission to the Dr. Philos. examination. The two doctoral degrees are in Norway considered to be of equal academic value. Which doctoral degrees similar to the Norwegian Dr.Philos degree exist internationally, preferably in medicine?