Investigative Procedure
After the hospital permission was obtained, the
investigators interviewed the patients separately.
During the interlocutions, the investigators explained
the purposes and the methods of the research,
and the time needed for and extent of data
accumulation. They emphasized the patient’s right
to withdraw from participation and that this interruption
would not affect their rights and interests.
Moreover, the information would be kept confidential.
Then the patients’ agreements were obtained.