Received: 21 February 2020
Accepted: 13 May 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of China Medical University (Shenyang, China AF-SDP-07-1, 0–01). All procedures were performed in accordance with ethical standards. Written consent was obtained from all participants after they had been informed of the objectives, benefits, medical items and confidentiality agreement regarding their personal information.
: All the participants gave consent for direct quotes from their interviews to be used in this manuscript.
: The authors declare that they have no competing interests.