First Online: 19 December 2018
Ethics approval and consent to participate
: The authors’ institutions and all participating bodies gave permission by a signed letter of informed consent. The study protocol was reviewed and approved by the Ethics Committee of the Nursing Science Faculty Universitas Indonesia, no. 0399/UN.2.F12.D/HKP.02.04/2016.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.