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World J Methodol. Dec 20, 2025; 15(4): 107699
Published online Dec 20, 2025. doi: 10.5662/wjm.v15.i4.107699
Figure 1
Figure 1 Timeline of the declaration of Helsinki document versions. DoH: Declaration of Helsinki.
Figure 2
Figure 2 Structural details of the declaration of Helsinki document versions by years. Word count was generated using https://www.montereylanguages.com/pdf-word-count-online-free-tool.html (Accessed on January 7, 2025).
Figure 3
Figure 3  Key elements of the declaration of Helsinki.