Received: 13 February 2020
Revised: 4 August 2020
Accepted: 5 September 2020
First Online: 28 September 2020
Compliance with ethical standards
: TTM received research funding from Yakult Honsha Co., Ltd. SY and AS are current employees of Yakult Honsha Co., Ltd., and VTT is a current employee of Yakult Vietnam Co., Ltd. All other authors have nothing to disclose.