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CANADA - JUNE 02: Royal Blood tapped for fighting men overseas. Among those who have volunteered blood for the wounded in the armed forces is Princess Juliana of Holland. She is shown above at Ottawa as she signs her name; giving the Voluntary Blood Donor Service the right to draw a pint of royal blood. (Photo by Toronto Star Archives/Toronto Star via Getty Images)

CANADA - JUNE 02:  Royal Blood tapped for fighting men overseas. Among those who have volunteered blood for the wounded in the armed forces is Princess Juliana of Holland. She is shown above at Ottawa as she signs her name; giving the Voluntary Blood Donor Service the right to draw a pint of royal blood.   (Photo by Toronto Star Archives/Toronto Star via Getty Images)