Efficacy of the argon plasma coagulation in patients with weight regain after gastric bypass: a randomized control trial oleh Gustavo Carvalho Gurian, Lígia Moriguchi Watanabe, Carla Barbosa Nonino, Mariana Barato, Maysa Araújo Ferreira-Julio, Francisco Alves Arantes, Thiago Sivieri, Natália Yumi Noronha, Dorotéia Silva Rossi Souza, Rafael Fernandes-Ferreira, Marcela Augusta de Souza Pinhel