Still Waters Osteopathy's website describes Dr. Ryan Christensen, DO as a board-certified osteopathic physician practicing Traditional Osteopathy, Osteopathic Manipulative Medicine/Treatment, and Integrative Medicine in Lake Orion, Michigan. He completed a dual residency in Family Medicine and Emergency Medicine in 2017 at McLaren Oakland Hospital and the Training in Policy Studies (TIPS) Health Policy Fellowship through the American Osteopathic Association. Of particular relevance to Long COVID and ME/CFS patients, Dr. Christensen offers The Perrin Technique — a manual lymphatic drainage technique developed for ME/CFS — and conducts Cranial Bootcamp masterclasses. Other services include osteopathy in the cranial field (OCF), craniosacral therapy, auricular battlefield acupuncture, trauma-informed care, and clinical hypnosis. He has previously served as president of the Oakland County and Macomb County Osteopathic Medical Associations.