Rocha, B. D. da ., Zamberlan, C. ., Pivetta, H. M. F. ., Santos, B. Z. ., & Antunes, B. S. . (2020). Upright positions in childbirth and the prevention of perineal lacerations: a systematic review and meta-analysis. Revista Da Escola De Enfermagem Da USP, 54, e03610. https://doi.org/10.1590/s1980-220x2018027503610