Mark Derrickson
Level 1
Ohio, USA
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Instructor Level
Mark Derrickson is no longer certified
Mark Derrickson is no longer certified and does not partake in internal trainings or seminars from the Wim Hof organisation. They are not qualified to teach the Wim Hof Method.
Mark Derrickson
Mark is no longer a Certified Wim Hof Method Instructor
