* Both New and Bronchochallenge allow the user to repeat the current step (performing a new trial of the current step) or to go to the next step or to one of the next steps (performing the first trial of the new step).
* Both New and Bronchochallenge allow the user to repeat the current step (performing a new trial of the current step) orto go to the next step or to one of the next steps (performing the first trial of the new step).