Funding
This trial was funded by the City of Yokohama. The service provider, Kids Public, Inc. offered the mobile health consultation service funded by the City of Yokohama. This work was supported by the Japan Society for the Promotion of Science (No. 26670306, 18H04071). Before the study was constructed, the University of Tokyo, the City of Yokohama, and Kids Public Inc. discussed the study design. The research team coordinated with members of the City of Yokohama to recruit participants. Kids Public Inc. collected participants’ personal information and shared it with the research team (with participants’ consent). Only the research team created the study protocol, collected data at baseline, and three months after delivery, analyzed the data, and edited the manuscript. The City of Yokohama and Kids Public Inc. had the opportunity to conduct a fact-check of the manuscript before submission; however, the authors had full editorial control of the manuscript and provided final approval for all content.