A Double-blinded Evaluation of Safety and Efficacy of Hylaform and Hylaform Plus Compared to Zyplast.
A Double-blinded Evaluation of Safety and Efficacy of Hylaform and Hylaform Plus Compared to Zyplast.
A clinical study to investigate the safety and efficacy of Hylaform and Hylaform Plus for
 correction of facial wrinkles.
Inclusion Criteria:

 -  bilateral nasolabial folds with severity score 3 or 4 on the 6-point grading scale

 Exclusion Criteria:

 -  pregnant/lactating women

 -  patients who previously received permanent facial implants or using ovet-the-counter
 products