Data collection
Twenty-five visits including baseline visits over 10 years are planned, with follow-up examinations scheduled at 1 day, 1 week, 1 month, 3 months, 6 months, 12 months for the first year, and every 6 months thereafter.Every time close to the scheduled visit, our research assistants will sincerely remind participants by text message or phone call. Besides, we offer a partial fee waiver for participant inspections.