What is the 4n training reference in conjunction with CFETP for wart treatments?

4N Treatment Reference

* Number: The number of treatments required varies and depends on the type of wart.

* Nitrogen: Liquid nitrogen is used to freeze and destroy the wart tissue.

* Needling: The wart may be needled to help the liquid nitrogen penetrate the wart tissue.

* Numbing: A topical anesthetic may be used to numb the area before treatment.