Improving mental health and physiological stress responses in mothers following traumatic childbirth and in their infants: study protocol for the Swiss TrAumatic biRth Trial (START). - Sandoz V; Deforges C; Stuijfzand S; Epiney M; Vial Y; Sekarski N; Messerli-Bürgy N; Ehlert U; Bickle-Graz M; Morisod Harari M; Porcheret K; Schechter DS; et al. (BMJ open, 2019)