I am not so sure those long term effects (except those that lead to blood cloths) are real.

A quick duck duck go shows that these are the symptoms:

    Tiredness or fatigue
    Difficulty thinking or concentrating (sometimes referred to as “brain fog”)
    Headache
    Loss of smell or taste
    Dizziness on standing
    Fast-beating or pounding heart (also known as heart palpitations)
    Chest pain
    Difficulty breathing or shortness of breath
    Cough
    Joint or muscle pain
    Depression or anxiety
    Fever
    Symptoms that get worse after physical or mental activities

Apart from the loss of smell, those are all things that are hard to quantify and could be something you are not aware of until you start looking for them. At which point you might become anexious and really start to notice them.