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The same concept was included in the textbook, \u201cIntroduction to Research Methodology for Specialists and Trainees,\u201d edited by P. M. Shaughn O\u2019Brien and Fiona Broughton Pipkin (third edition, 2017, Cambridge University Press), chapter 24 page 191.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}},{"value":"Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Publisher\u2019s Note"}}],"article-number":"184"}}