Document is current

Article History

Received: 8 September 2024

Accepted: 15 October 2024

First Online: 19 December 2024

Declarations

:

: This study was conducted with the approval of the Hokuriku University Research Ethics Review Committee for Human Subjects (Approval No. 2023–27). All study tasks were carried out in accordance with the Declaration of Helsinki. Prior to experiment, according to the decision the Hokuriku University Research Ethics Review Committee for Human Subjects, we explained in advance the outline and invasion of this experiment and the presence / absence and form of publication, and then conducted subjects who obtained written consent to the purpose of this experiment.

: Not applicable.

: The authors declare that they have no competing interests. However, This study was conducted in collaboration with Yumelon Kurokawa Co., Ltd. The costs associated with the transportation and development of the mattresses were funded by Yumeron Kurokawa Co., Ltd. Additionally, expenses incurred by Hokuriku university, including the purchase of consumables, travel, and accommodation, were funded through joint research funds provided under a research agreement between the University and Yumeron Kurokawa Co., Ltd.