What is the follow-up period for this study?1 point7 daysCirca 3 weeksMore than a monthNot possible to say based on the abstract

To determine the follow-up period for the study, we need to parse the information provided in the abstract of the study. Since the question asks for specific details regarding the study's duration, it is best to review the abstract for any mention of the follow-up period.

1. Identify Information in the Abstract: Look for key phrases that indicate timeframes, such as "follow-up period," "duration," "follow-up duration," or similar terms.
2. Analyze the Options: Consider each option given:
   • 7 days
   • Circa 3 weeks
   • More than a month
   • Not possible to say based on the abstract
3. Evaluate the Findings: Based on the information collected from the abstract, determine which option accurately reflects the follow-up period stated.

Since we cannot access the abstract directly here, my conclusion is that if the abstract does not provide a clear indication of the follow-up period, then the most suitable answer may be "Not possible to say based on the abstract."

Final Answer

Not possible to say based on the abstract.