Sequential application of non-pharmacological interventions reduces the severity of labour pain, delays use of pharmacological analgesia, and improves some obstetric outcomes: a randomised trial - Gallo, Rubneide Barreto Silva; Santana, Licia Santos; Marcolin, Alessandra Cristina; Duarte, Geraldo; Quintana, Silvana Maria (Journal of Physiotherapy, 2018)