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Article History

Received: 23 February 2020

Accepted: 19 May 2020

First Online: 7 June 2020

Compliance with ethical standards

:

: Not applicable.

: Nothing to declare.

: All procedures performed in studies involving human participants 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. Ethical approval by institutional board was not required for the nature of the research (validation of a disease status questionnaire).

: The research was conducted ethically in accordance with the declaration of Helsinki. As stated in the manuscript, informed consent was obtained from all included individual participants for the study, as well as for data collection.