Article History
Received: 21 August 2017
Accepted: 5 September 2017
First Online: 22 September 2017
Compliance with ethical standards
: This study was approved by the ethics committee of our institute and was conducted from January through March 2013 in accordance with the Declaration of Helsinki. Patient anonymity was maintained during data collection, and security of personal information was strictly controlled. All patients gave their informed consent prior to their inclusion in the study.
: Yosuke Hattori received grants from Pfizer and Janssen Pharma. Daihei Kida received grants from Towa Pharma Corporation and Chugai Pharma Corporation. Atsushi Kaneko received grants from Astellas Pharma.