Main study: Randomized, evaluator-blinded, no treatment controlled multicenter study to evaluate safety and effectiveness of GAL1906 for the correction of wrinkles in the décolletage area.

Sub-study: To evaluate imaging interpretation of mammograms in subjects who were enrolled and treated in the 43USRV1906 main study. The sub-study will determine if hyaluronic acid injections in the décolletage interfere with diagnosis or interpretation of mammogram results.

Inclusion Criteria for Main study:

• Subjects willing to comply with the requirements of the study and providing a signed written informed consent.
• Non-pregnant, non-breastfeeding females, over the age of 21.
• Subjects seeking treatment for the décolletage.

Inclusion Criteria for Sub-study:

• Subject is willing to comply with the requirements of the study and provide a signed written informed consent.
• Subject has received treatment with GAL1906 in the main protocol.

Exclusion Criteria for Main study:

• Known/previous allergy or hypersensitivity to any injectable HA gel or to gram positive bacterial proteins.
• History of allergy or hypersensitivity to lidocaine or other amidetype anesthetics, or topical anesthetics or nerve blocking agents (if such products are intended to be used for that subject).

Exclusion Criteria for Sub-study:

• Subject is pregnant or nursing AND has no mammogram taken post GAL1906 treatment.