Funding for this research was provided by:
Stiftelsen Kronprinsessan Margaretas Arbetsnämnd för Synskadade
Svenska Läkaresällskapet
Article History
Received: 4 July 2018
Accepted: 12 October 2018
First Online: 22 October 2018
Ethics approval and consent to participate
: All procedures performed in the study were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the Regional Ethical Review Board in Uppsala, Sweden (number:2005:133/1).Informed consent for participating was obtained from all caregivers to the individual participants included in the study.
: Not applicable. No individual data, details or images occur in the manuscript.
: The authors declare that they have no competing interests.
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