International consensus recommendations on the aesthetic usage of botulinum toxin type A (Speywood Unit) - Part II: Wrinkles on the middle and lower face, neck and chest

1. Ascher, B.
2. Talarico, S.
3. Cassuto, D.
4. Escobar, S.
5. Hexsel, D.
6. Jaén, P.
7. Monheit, G.D.
8. Rzany, B.
9. Viel, M.