There are currently 50 members in the chorus who apply voluntarily and are recruited through selective trials from the employees of the group headquarters and its subordinate companies.

Large trials of selective serotonin reuptake inhibitors are being carried out in order to assess their effectiveness in reducing the above symptoms.

Vardenafil, as a novel and highly selective phosphodiesterase 5 inhibitor, has been proved by many clinical trials to be quite safe for the cardiovascular system.