International consensus recommendations on the aesthetic usage of botulinum toxin type A (Speywood Unit)--Part I: Upper facial wrinkles.
Ascher
B
B
Clinique de Chirurgie Esthétique Iéna, Paris, France. benjaminascher@wanadoo.fr
Talarico
S
S
Cassuto
D
D
Escobar
S
S
Hexsel
D
D
Jaén
P
P
Monheit
G D
GD
Rzany
B
B
Viel
M
M