rare blood condition

The provided news articles focus on the death of King Harald V of Norway and the subsequent ascension of his son, Haakon VIII, to the throne. The articles detail the national mourning in Norway, with crowds gathering to pay their respects. The Mayor of Oslo, Anne Lindboe, has cancelled her wedding due to the king's passing. There is no mention or information regarding a rare blood condition in either of the provided snippets. Therefore, a summary about a rare blood condition cannot be generated based on this content.