Received: 20 December 2016
Accepted: 21 March 2018
First Online: 2 April 2018
Ethics approval and consent to participate
: This study was approved by the University of L’Aquila Ethics Commitee (Approval no. 3571/04.02.2016).Permission to access the data for this study was obtained from the University of L’Aquila, Department of Life, Health and Environmental Sciences, San Salvatore Hospital, L’Aquila, Italy.
: Not applicable.
: The authors declare that they have no competing interests.
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