Detailed Instructions: Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
Q: Abstract: A review of the different types of adsorbents being used in hemoperfusion. The different types of polymers used in coating charcoal are also reviewed. 
 Which is the apt title for the abstract? option1: Technical aspects of hemoperfusion. option2: National surveillance of AIDS in health care workers.
A:
Technical aspects of hemoperfusion.