1 Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy; Palliative Care and Pain Management Network, ASL1 Abruzzo, Hospice Care Center of L'Aquila, L'Aquila, Italy; Palliative Care and Pain Management Network, ASL1 Abruzzo, Hospice Care Center of Pescina, Pescina, AQ, Italy. Electronic address: angelo.cacchio@univaq.it.
2 Palliative Care and Pain Management Network, ASL1 Abruzzo, Hospice Care Center of L'Aquila, L'Aquila, Italy.
3 Palliative Care and Pain Management Network, ASL1 Abruzzo, Hospice Care Center of Pescina, Pescina, AQ, Italy.
4 Department of Biotechnology and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy.
5 Pediatric and Developmental Cardiology Services, Maternal-Infant Department, ASL Abruzzo 1, "San Salvatore" Hospital of L'Aquila, L'Aquila, Italy.
6 Department of Anatomical and Histological Sciences, Legal Medicine and Orthopedics, Sapienza University of Rome, Italy.
7 Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy; Palliative Care and Pain Management Network, ASL1 Abruzzo, Hospice Care Center of Pescina, Pescina, AQ, Italy.