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Article History

Received: 8 June 2017

Accepted: 16 January 2018

First Online: 25 January 2018

Ethics approval and consent to participate

: Ethics approval was granted by Ethics Committee of Medical Academic Center of Lisbon, Faculty of Medicine, University of Lisbon, and all procedures will be conducted in accordance with this approved protocol. Written consent for participation in the study will be obtained from all participants prior to their involvement.

: Not applicable. Individual clinical data will not be used in this study.

: All authors declare no support from any organization for the submitted work, no financial relationships with any organisations that might have an interest in the submitted work in the previous 3 years, and no other relationships or activities that could appear to have influenced the submitted work.

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