– Gi?m m?i m?t khi s? d?ng các ph??ng ti?n ?i?n t? nh? vi tính, ?iên tho?i … b?i b? võng m?c m?t.“If the infant is sleeping, the last thing I’m likely to do is jam a finger in their mouth,” said Dr. Lisa Berens, a professor with the UC San Francisco University of Dentistry. “It’s much more for getting them habituated to the feelin