BIDDINGHUIZEN, NETHERLANDS - MARCH 5 : Pieter van Vollenhoven takes an picture of his son Prince Pieter-Christiaan at the Hollandse 100 ice skating and cycling fund raising event at Flevonice on March 5, 2017 in Biddinghuizen, Netherlands. The Hollandse 100 is to raise money for the foundation against lymphoma Lymph&Co founded by Prince Bernhard who survived lymphoma. (Photo by Patrick van Katwijk/Getty Images)
