Following this puts new work involving it at the top of your briefing, with a note saying why it is there. Links are taken from the source record, never inferred.
This is a clinical trial registry record describing a planned interventional study with no results reported; enrollment has not yet begun, making it an early-stage protocol document.
This is a prospective observational cohort study in early recruitment phase with no results yet reported; it aims to develop a diagnostic prediction rule but has not yet enrolled participants or generated outcome data.