General surgical training at Albert Schweitzer hospital in The Netherlands inspired his love of working in regional centres. His advanced training at Amsterdam University Medical Centre provided him with a deep and broad grasp on all aspects of plastic, reconstructive and hand surgery. Prof Marco Ritt (Amsterdam) was his supervisor and mentor and is a world expert on hand and wrist surgery. Dr Henri Winters was one of his trainers and is one of the top reconstructive surgeons in The Netherlands. Profs Allen Bishop, Alexander Shin and Robert Spinner form the Mayo Clinic brachial plexus and upper extremity reconstructive group in Rochester, Minnesota and provided guidance and mentorship during his microvascular surgery research there.
The Mayo Clinic core values were deeply instilled during that time, especially that of always keeping the needs of the patient first. Profs Stan Monstrey, Philip Blondeel, Koen Van Landuyt and Moustapha Hamdi guided him through the last three months of training in Gent, Belgium and inspired his love of autologous breast reconstruction and perforator flap surgery. Profs Luc De Smet and Ilse Degreef of Leuven University, Belgium taught him the finesses of hand and wrist surgery during a six-month fellowship at the conclusion of his advanced training. Following that, during a two-month observership in Rio de Janeiro, Prof Ivo Pitanguy taught him that the essence of a successful career lies in embracing those around you and always striving for a better outcome.
His team demonstrated world-class excellence in aesthetic surgery of the face and body. In 2012 Prof Hamdi brought Dr Larsen on the Brussels University Hospital staff and taught him many valuable skills in perforator flap surgery and breast surgery; concurrently he worked in Amsterdam at Prof Ritt’s private day surgery for hand and wrist surgery, The Hand Clinic. In 2013 Mikko established a breast and head and neck reconstructive surgery service in The Hague. While in The Hague he remained engaged in research and teaching, including supervising a PhD project on advanced technology in wound healing, and was a member on the regional medical research ethics advisory board.