Low-level laser therapy for pain relief after episiotomy: a double-blind randomised clinical trial - Santos, Jaqueline de Oliveira; Oliveira, Sonia Maria Junqueira Vasconcellos de; Silva, Flora Maria Barbosa da; Nobre, Moacyr Roberto Cuce; Osava, Ruth Hitomi; Riesco, Maria Luiza Gonzalez (Journal of Clinical Nursing, 2012)