" Comparative study of the diffusion of five botulinum toxins type-A in five dosages of use: Are there differences amongst the commercially-available products? " Costa, Adilson; Pereira, Elisangela Samartin Pegas; Pereira, Margareth de Oliveira; Santos, Felipe Borba Calixto dos; Favaro, Raquel; Stocco, Paula Luz; Arruda, Lúcia Helena Fávaro de