Alleviating effect of lavender (Lavandula angustifolia) and its major components on postherpetic pain: a randomized blinded controlled trial.

"Declarations Ethics approval and consent to participateThis study was approved by the Institutional Review Board of Korea University Ansan Hospital (No. AS12200) and performed in accordance with the declaration of Helsinki. All participants provided written consent voluntarily. Consent for publicationNot applicable. Competing interestsThe authors declare no competing interests. Competing interests The authors declare no competing interests."

"Funding This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1A2C2004118) and the Institute of Nursing Research, Korea University Grant. This manuscript is a revision of J.Y.’s master’s thesis from Korea University."

"Trial registration This study was retrospectively registered on the Clinical Research Information Service. Registration number: KCT0007772, first registration 06/10/2022."