Dermatologist Marianne Crijns had been working at the Rijnland hospital in Leiderdorp for over 20 years before making the switch to the Antoni van Leeuwenhoek hospital in Amsterdam. Until 2018 Marianne was the head of the dermatology department of the hospital and head of the Dutch society of psychodermatology (NVPD). Marianne was a Cycle Expert from start until september of 2021.