QG, design, critical revision of article and approval of article.
Robert Chilton: critical literature review, critical manuscript review, approval of article.
Theodore Okerson: concept, critical literature review, drafting of article, approval of article.
All authors: design, critical revision of article and approval of article.
JB participated in concept/design, critical revision, and approval of article.
Concept/design LD; Data collection AN, DE Dataanalysis/interpretationon AN, DE, LD, Drafting, critical revision and approval of article AN, DE, LD; Statistics AN, DE, LD.
SÖ participated in the conception and design, collection and assembly of data, provision of study materials, analysis of the data, statistical expertise, drafting the article, revision of the article and final approval of the article.
Eİ participated in the conception and design, collection and assembly of data, provision of study materials, analysis of the data, statistical expertise, drafting the article, revision of the article and final approval of the article.
BÖ participated in the conception and design, collection and assembly of data, provision of study materials, analysis of the data, statistical expertise, drafting the article, revision of the article and final approval of the article.
SA: data interpretation, critical revision of the article, final approval of the article, obtaining of funding.
