Author Contributions
L.-C.H., C.-L.L., Y.-T.C. and C.-H.B. organized and conducted the study, designed the questionnaire, interpreted the results, proposed the structure of the paper, and formulated the paper; L.-C.H. and C.-H.B. performed the statistical analysis; C.-L.L. and R.-Y.C. managed the research project; C.-L.L. and R.-Y.C. critically appraised the paper, and made final suggestions; L.-C.H., C.-L.L. and C.-H.B. are the guarantors of this work, had full access to all the data in the study, and take responsibility for the integrity of the data and the accuracy of the data analysis. All authors have read and agreed to the published version of the manuscript.