Received: 5 January 2016
Accepted: 5 April 2018
First Online: 16 April 2018
Ethics approval and consent to participate
: The present retrospective analysis was approved by the Ethics Comittee of Centro Hospitalar de Lisboa Central and the study performed in accordance with the Declaration of Helsinki. Written consent to perform the exam and analyse the data was obtained for all the patients included.
: The authors declare that they have no competing interests.
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