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. 2023 Jun 2;17:1116154. doi: 10.3389/fnins.2023.1116154

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Copyright © 2023 Trinh, Le, Bui and Thai.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Study protocol. T1, T2: Before auricular acupressure, T3: The 1^st auricular acupressure with stimulation in 30 s, T4: Auricular acupressure without stimulation, T5: The 2^nd auricular acupressure with stimulation in 30 s, T6: Auricular acupressure without stimulation, T7: The 3^rd auricular acupressure with stimulation in 30 s, T8: After auricular acupressure.