sentences:  In 1988, Petr Skrabanek classified osteopathy as one of the "paranormal" forms of alternative medicine, commenting that it has a view of disease which had no meaning outside its own closed system.In a 1995 conference address, the president of the Association of American Medical Colleges, Jordan J. Cohen, pinpointed OMT as a defining difference between M.D.s and D.O.s; while he saw there was no quarrel in the appropriateness of manipulation for musculoskeletal treatment, the difficulty centered on "applying manipulative therapy to treat other systemic diseases" – at that point, Cohen maintained, "we enter the realm of skepticism on the part of the allopathic world.