Doubleblind randomized study performed with 4% lidocaine cream and vehicle in the application of type A botulinum toxin: analysis of the pain during the procedure and of the interference with the efficacy and duration of the effect
Geraldo Magela Magalhães1; Maria de Fátima Melo Borges2; Amanda Gomes Dell'Horto3; Denise de Borba Carvalho3; Marcela Mattos Simões Mendonça3; Marcos Alvarenga de Souza Júnior3