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Dear Sir or Madam,
I have noticed that after I have done sports - school sports 12 times a year in vocational school (I do not do any sports privately) - I have a feeling in my left chest as if something is moving from top to bottom. It then stops, does not hurt. But I am afraid that it is something serious. ECG, long-term monitoring and blood tests have already been done and everything is fine.
Kind regards