title: [Trends, environment or a mystery?].
authors.forename: J
authors.initials: J
authors.lastname: Ostberg
mesh_terms: D018876:Environmental Illness / Q000175:diagnosis / Q000209:etiology; D006801:Humans; D011602:Psychophysiologic Disorders / Q000175:diagnosis / Q000209:etiology; D011611:Psychosomatic Medicine / Q000639:trends*; D009626:Terminology as Topic