Publications by authors named "Helen Bian"

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Ethical implications of dermatology trainees proposing alternative procedures for educational purposes.
Helen Bian, Neelesh Patrick Jain, Jane M Grant-Kels, Hao Feng

J Am Acad Dermatol· July 2025

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Non-collapsibility and built-in selection bias of period-specific and conventional hazard ratio in randomized controlled trials.
Helen Bian, Menglan Pang, Guanbo Wang, Zihang Lu

BMC Med Res Methodol· November 2024

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