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Diagrammatic summary of the experimental protocol. SHSS: Stanford Hypnosis Sensitivity Scale; VAS: visual analogue scale; S-VAS: sensory dyspnoea VAS; A-VAS: affective dyspnoea VAS; MDP: Multidimensional Dyspnea Profile; ITL: inspiratory threshold loading (predominantly induces “excessive inspiratory effort”); CO2: carbon dioxide stimulation with restriction of the reflex ventilatory response (predominantly induces “air hunger”).
