We pledge to meet fully, and where possible exceed, internationally recognized standards of personal data privacy protection, in complying with the requirements of the Personal Data (Privacy) Ordinance. The personal data of the participants in this study shall be collected only related to the purpose of the study. All data provided will be anonymous and kept confidential. For security purposes, all data will be kept in a content management system that is protected by a password and special Web maintenance service. Only researchers in this study have access to data provided by participants who have consented to join the study. The data shall be deleted upon fulfillment of the purpose for which the data are used.