Other URLs associated with Signal, such as Signal.link and Signal.group links, do not appear to be affected by the block. Furthermore, other contact links for third-party messaging services like ...

Background and objective Atrial fibrillation (AF) is common and causes impaired quality of life, an increased risk of stroke and death as well as frequent hospital admissions. The majority of patients ...

1 Lugouqiao Second Community Health Service Center, China Aerospace Science & Industry Corporation 731 Hospital, Beijing, China 2 Department of Cardiological Medicine, China Academy of Chinese Medical ...