The method for checking loudspeakers comprises the steps of emitting a pulse over an electrical connection with the loudspeaker; measuring the electrical resistance over the connection; determining the state of the loudspeaker according to the measured resistance; and triggering a corrective action depending on the determined state of the loudspeaker. Specific examples of autoimmune diseases that can be treated or prevented with the compounds include rheumatoid arthritis andor its associated symptoms, systemic lups erythematosis andor its associated symptoms and multiple sclerosis andor its associated symptoms. A luminescent layer to which an ultraviolet ray is irradiated emits a light. The rate of rotation is chosen such that each object traces a substantially circular pathway in the syringe barrel and remains in suspension. A suture is positioned in the hollow tubular portion.