For planned collection protocols(like clinical trials), administrators can define the multiple events(time points) at which participant will visit for specimen collections. There are two fields which we specify in collection event - 'The Study Calendar Event Point' and 'The Collection Point Label'. Definitions of the fields:
The Study Calendar Event Point is the time (currently measured in days) from the registration date when the participant will visit for specimen collections.
The Collection Point Label is the user friendly name or designation for the Study Calendar Time Point. (e.g. "Pre-Therapy", "Surgery", "90 day follow-up", "Relapse"). This will help when samples are searched and researcher wants to know which cycle of the study was the sample collected.