Microbiological and clinical effects of probiotics and antibiotics on nonsurgical treatment of chronic periodontitis: a randomized placebo- controlled trial with 9-month follow-up. J Appl Oral Sci [Internet]. 2018 Jan. 1 [cited 2024 May 2];26:e20170075. Available from: https://revistas.usp.br/jaos/article/view/142435