Received: 12 August 2020
Revised: 22 September 2020
Accepted: 7 October 2020
First Online: 30 October 2020
Compliance with ethical standards
: The scientific guarantor of this publication is Durval C. Costa, MD, MSc, PhD, FRCR, head of Nuclear Medicine-Radiopharmacology department at Champalimaud Foundation, Lisbon, Portugal.
: 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.
: One of the authors has significant statistical expertise (Francisco P. M. Oliveira is an experienced statistician; he has a degree in Mathematics, a MSc in Computational Methods, and a PhD in Biomedical Engineering). No complex statistical methods were necessary for this paper.
: Written informed consent was obtained from all subjects (patients) in this study.
: Institutional Review Board approval was obtained.
: • prospective• cross-sectional and observational study• performed at one institution