Funding for this research was provided by:
Ministry for Health and Welfare, Republic of Korea (1520230)
Article History
Received: 30 January 2018
Revised: 2 March 2018
Accepted: 19 March 2018
First Online: 30 April 2018
Compliance with ethical standards
:
: The scientific guarantor of this publication is Jin Mo Goo.
: The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
: No complex statistical methods were necessary for this paper.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: Some study subjects or cohorts have been previously reported in journal articles (Eur Radiol 2016, 26:4465-4474; Eur J Radiol 2016, 85:1174-1180; Eur Radiol 2017, 27:3266-3274; Eur Radiol 2017, doi:10.1007/s00330-017-5171-7; Eur Radiol 2017, 27:1369-1376).
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