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STEP training courses illustrated. (A) Timeline of key dates for the French STEP training courses (blue) and key French publications (grey-blue). (B) Geographical distribution of participants by city in metropolitan France and Corsica. (C) Evolution of the number of registrations and course formulas over the years. The number of registrations includes only regular courses and does not include flying modules. (D) Professional profiles of the participants in the STEP training courses.
